Journals >Chinese Optics Letters
Contents
2016
Volume: 14 Issue 5
21 Article(s)
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Holography
Multiframe full-field heterodyne digital holographic microscopy
Xiaoyu Lv, Bin Xiangli, Wenxi Zhang, Zhou Wu... and Zhiliang Zhou|Show fewer author(s)
Digital holographic microscopy using multiframe full-field heterodyne technology is discussed in which two acousto-optic modulators are applied to generate low-frequency heterodyne interference and a high-speed camera is applied to acquire multiframe full-field holograms. We use a temporal frequency spectrum analysis aDigital holographic microscopy using multiframe full-field heterodyne technology is discussed in which two acousto-optic modulators are applied to generate low-frequency heterodyne interference and a high-speed camera is applied to acquire multiframe full-field holograms. We use a temporal frequency spectrum analysis algorithm to extract the object’s information. The twin-image problem can be solved and the random noise can be significantly suppressed. The relationship between the frame number and the reconstruction accuracy is discussed. The typical objects of microlenses and biology cells are reconstructed well with 100-frame holograms for illustration..
Chinese Optics Letters
- Publication Date: May. 10, 2016
- Vol. 14, Issue 5, 050901 (2016)
Lasers and Laser Optics
Nanoscale-resolved patterning on metal hydrazone complex thin films using diode-based maskless laser writing in the visible light regime
Kui Zhang, Zhimin Chen, Yongyou Geng, Yang Wang, and Yiqun Wu
Metal hydrazone complex thin films are used as laser patterning materials, and the patterns with a minimum resolution of about 78 nm are successfully obtained by the laser writing setup (λ=405 nm, NA=0.9). The minimum resolution is only about 1/8 of the writing spot size. In the formation of patterns, there is only a sMetal hydrazone complex thin films are used as laser patterning materials, and the patterns with a minimum resolution of about 78 nm are successfully obtained by the laser writing setup (λ = 405 nm NA = 0.9
Chinese Optics Letters
- Publication Date: May. 10, 2016
- Vol. 14, Issue 5, 051401 (2016)
Ultra-fast diagnosis of shock waves and plasma at front and rear surfaces in the bulk of fused silica induced by an Nd:YAG pulse laser
Qiang Zhou, Rong Qiu, Yong Jiang, Xiang Gao... and Huan Ren|Show fewer author(s)
We investigate the dynamic processes of the Nd:YAG pulse laser ablation of fused silica by ultrafast time-resolved optical diagnosis with a nanosecond time resolution. The evolution process of plasma expansion in air and shock waves propagation in the bulk are both obtained with spatial and temporal resolutions. Laser-We investigate the dynamic processes of the Nd:YAG pulse laser ablation of fused silica by ultrafast time-resolved optical diagnosis with a nanosecond time resolution. The evolution process of plasma expansion in air and shock waves propagation in the bulk are both obtained with spatial and temporal resolutions. Laser-induced damage in the bulk of fused silica with filaments and shock waves are observed. Thermoelastic wave, mechanical wave, and shock wave dependence on the laser fluence and intensity of the plasma are analyzed. The shock pressure P T D
Chinese Optics Letters
- Publication Date: May. 10, 2016
- Vol. 14, Issue 5, 051402 (2016)
Compact phase-lock loop for external cavity diode lasers
Chunhua Wei, Shuhua Yan, Aiai Jia, Yukun Luo... and Zehuan Li|Show fewer author(s)
We present a compact, low-noise, and inexpensive optical phase-lock loop (OPLL) system to synchronize the frequency and the phase between two external cavity diode lasers. Based on a direct digital synthesizer technique, a programmable radio-frequency generator is implemented as the reference signal source. The OPLL haWe present a compact, low-noise, and inexpensive optical phase-lock loop (OPLL) system to synchronize the frequency and the phase between two external cavity diode lasers. Based on a direct digital synthesizer technique, a programmable radio-frequency generator is implemented as the reference signal source. The OPLL has a narrow beat note linewidth below 1 Hz and a residual mean-square phase error of 0.06 rad 2
Chinese Optics Letters
- Publication Date: May. 10, 2016
- Vol. 14, Issue 5, 051403 (2016)
Diode-pumped composite ceramic Nd:YAG planar waveguide amplifier with 327 mJ output at 100 Hz repetition rate
Jiao Liu, Lin Ge, Liwen Feng, Hao Jiang... and Jiang Li|Show fewer author(s)
We present a diode-pumped high-energy ceramic Nd:YAG planar waveguide that is demonstrated as a record in output energy for the ceramic planar waveguide fabricated by nonaqueous tape casting and solid-state reactive sintering. Under a repetition rate of 100 Hz and a pulse width of 250 μs, a maximum output pulse energy We present a diode-pumped high-energy ceramic Nd:YAG planar waveguide that is demonstrated as a record in output energy for the ceramic planar waveguide fabricated by nonaqueous tape casting and solid-state reactive sintering. Under a repetition rate of 100 Hz and a pulse width of 250 μs, a maximum output pulse energy of 327 mJ is obtained with a beam quality factor of = 2.6 × 7.0
Chinese Optics Letters
- Publication Date: May. 10, 2016
- Vol. 14, Issue 5, 051404 (2016)
Optical Devices
Graphene field effect transistor-based terahertz modulator with small operating voltage and low insertion loss
Jingbo Liu, Pingjian Li, Yuanfu Chen, Xinbo Song... and Wanli Zhang|Show fewer author(s)
In this work, we report a broadband terahertz wave modulator based on a top-gate graphene field effect transistor with polyimide as the gate dielectric on a PET substrate. The transmission of the terahertz wave is modulated by controlling the Fermi level of graphene via the polyimide as the top-gate dielectric materialIn this work, we report a broadband terahertz wave modulator based on a top-gate graphene field effect transistor with polyimide as the gate dielectric on a PET substrate. The transmission of the terahertz wave is modulated by controlling the Fermi level of graphene via the polyimide as the top-gate dielectric material instead of the traditional dielectric materials. It is found that the terahertz modulator can achieve a modulation depth of ～ 20.9 %
Chinese Optics Letters
- Publication Date: May. 10, 2016
- Vol. 14, Issue 5, 052301 (2016)
Tunable multiple plasmon-induced transparency with side-coupled rectangle cavities
Dongdong Liu, Qiubo Fan, Maofei Mei, Jicheng Wang... and Jian Lu|Show fewer author(s)
The tunable multiple plasmon-induced transparency (PIT) effect is investigated numerically in a metal-insulator-metal (MIM) waveguide with three side-coupled rectangular resonators. The system exhibits dual-mode PIT effects in the visible and near-infrared regions. By adjusting the geometrical parameters of the structuThe tunable multiple plasmon-induced transparency (PIT) effect is investigated numerically in a metal-insulator-metal (MIM) waveguide with three side-coupled rectangular resonators. The system exhibits dual-mode PIT effects in the visible and near-infrared regions. By adjusting the geometrical parameters of the structure, we can manipulate not only each single PIT window, but also the double PIT windows simultaneously. Our structures may have potential applications for optical communication, integrated optics, and optical information processing. The finite element method (FEM) illustrates our theoretical design..
Chinese Optics Letters
- Publication Date: May. 10, 2016
- Vol. 14, Issue 5, 052302 (2016)
Fiber Optics and Optical Communications
Fiber in-line Fabry–Pérot interferometer for simultaneous measurement of reflective index and temperature
Xiaoqi Ni, Ming Wang, and Dongmei Guo
A fiber in-line Fabry–Pérot interferometer is presented. The sensing head consists of a micro ellipsoidal air cavity and a small section of solid-core photonic crystal fiber. The reflective index (RI) and temperature can be interrogated simultaneously through a fast Fourier transform and by tracing the dip wavelenA fiber in-line Fabry–Pérot interferometer is presented. The sensing head consists of a micro ellipsoidal air cavity and a small section of solid-core photonic crystal fiber. The reflective index (RI) and temperature can be interrogated simultaneously through a fast Fourier transform and by tracing the dip wavelength shift of the reflective spectrum. Experimental results show that the RI amplitude and wavelength sensitivities are 5.30/RIU and 8.46 × 10 1 nm / RIU 6.8 × 10 4 / ° C 2.48 × 10 3 nm / ° C
Chinese Optics Letters
- Publication Date: May. 10, 2016
- Vol. 14, Issue 5, 050601 (2016)
Dual-polarization fiber grating laser-based laser Doppler velocimeter
Zeyuan Kuang, Linghao Cheng, Yizhi Liang, Hao Liang, and Bai-Ou Guan
A dual-frequency laser Doppler velocimeter implemented by a dual-polarization fiber grating laser is proposed, with the two laser frequencies produced by the two orthogonally polarized laser outputs of the fiber grating laser. The reflected laser outputs from a moving target experience the Doppler frequency shift, whicA dual-frequency laser Doppler velocimeter implemented by a dual-polarization fiber grating laser is proposed, with the two laser frequencies produced by the two orthogonally polarized laser outputs of the fiber grating laser. The reflected laser outputs from a moving target experience the Doppler frequency shift, which is shown to be linearly related to the velocity and the beat note frequency difference between the laser outputs and the reflected light. With a digital frequency demodulation scheme, a high sensitivity of 0.64 MHz/(m/s) and a velocity resolution of less than 0.5% of the velocity for velocity measurement are demonstrated, which shows that the proposed laser Doppler velocimeter is capable of measurement of wide range of velocity..
Chinese Optics Letters
- Publication Date: May. 10, 2016
- Vol. 14, Issue 5, 050602 (2016)
Combined nonlinear effects for UV to visible wavelength generation in a photonic crystal fiber
Binbin Yan, Jinhui Yuan, Xinzhu Sang, Kuiru Wang, and Chongxiu Yu
We experimentally study the combined nonlinear effects, including four-wave mixing, stimulated Raman scattering, soliton dynamics, and cross-phase modulation by coupling femtosecond pulses around 850 nm into the normal dispersion region near the zero-dispersion wavelength in the fundamental mode of a homemade silica phWe experimentally study the combined nonlinear effects, including four-wave mixing, stimulated Raman scattering, soliton dynamics, and cross-phase modulation by coupling femtosecond pulses around 850 nm into the normal dispersion region near the zero-dispersion wavelength in the fundamental mode of a homemade silica photonic crystal fiber. The nonlinear optical dynamics at different stages are demonstrated, and the discrete ultraviolet (UV) to visible wavelengths widely separated from the pump wave are generated by the interaction of several nonlinear effects involved. The UV to visible wavelengths can be used as short pulse sources for multiphoton ionization, fluorescence spectroscopy, and biochemical imaging..
Chinese Optics Letters
- Publication Date: May. 10, 2016
- Vol. 14, Issue 5, 050603 (2016)
Refractive index and temperature sensing characteristics of an optical fiber sensor based on a tapered single mode fiber/polarization maintaining fiber
Zaihang Yang, Hao Sun, Tingting Gang, Nan Liu... and Manli Hu|Show fewer author(s)
An evanescent field optical fiber sensor based on a short section of polarization maintaining fiber spliced with a tapered single mode fiber is proposed and experimentally investigated. We mainly focus on the refractive index (RI) and temperature sensing characteristics of this compact device. The transmission spectrumAn evanescent field optical fiber sensor based on a short section of polarization maintaining fiber spliced with a tapered single mode fiber is proposed and experimentally investigated. We mainly focus on the refractive index (RI) and temperature sensing characteristics of this compact device. The transmission spectrum of the resonance wavelength, induced by the interference between the excited low order cladding modes and core modes, shows the quadratic function relationships with RI and linear relationships with temperature. Thus, the proposal of this simple-to-fabricate, compact, and low cost sensor shows its possible potential in the sensitive detection field..
Chinese Optics Letters
- Publication Date: May. 10, 2016
- Vol. 14, Issue 5, 050604 (2016)
Coherent ONU based on 850 μm-long cavity-RSOA for next-generation ultra-dense access network
Guang Yong Chu, Adolfo Lerín, Iván N. Cano, Victor Polo, and Josep Prat
In this Letter, an efficient bidirectional differential phase-shift keying (DPSK)—DPSK transmission for a ultra-dense wavelength division-multiplexed passive optical network is proposed. A single distributed feedback laser at the optical network unit (ONU) is used both as the local laser for downlink coherent detectionIn this Letter, an efficient bidirectional differential phase-shift keying (DPSK)—DPSK transmission for a ultra-dense wavelength division-multiplexed passive optical network is proposed. A single distributed feedback laser at the optical network unit (ONU) is used both as the local laser for downlink coherent detection and the optical carrier for uplink. Phase-shift keying is generated using a low-cost reflective semiconductor optical amplifier (RSOA) at the ONU. The RSOA chip has the bandwidth of 4.7 GHz at the maximum input power and bias current. For uplink transmission, the sensitivity of the RSOA chip reaches 48.2 dBm rate = 10 3
Chinese Optics Letters
- Publication Date: May. 10, 2016
- Vol. 14, Issue 5, 050605 (2016)
Temperature-compensated dual-polarization fiber grating laser sensors
Jianming Zhu, Long Jin, Yizhi Liang, Linghao Cheng, and Bai-Ou Guan
We report on temperature compensation for beat-frequency-encoded dual-polarization fiber laser sensors based on a cleave-rotate-splice method. By cleaving the laser cavity into two segments with comparable lengths, aligning them with a rotated angle of 90°, and then fusion splicing the two halves, the temperature We report on temperature compensation for beat-frequency-encoded dual-polarization fiber laser sensors based on a cleave-rotate-splice method. By cleaving the laser cavity into two segments with comparable lengths, aligning them with a rotated angle of 90°, and then fusion splicing the two halves, the temperature sensitivity in terms of beat-frequency variation can be greatly reduced from 1.99 0.30 MHz / ° C ± 30 ± 25 kHz
Chinese Optics Letters
- Publication Date: May. 10, 2016
- Vol. 14, Issue 5, 050606 (2016)
Multi-hop relay-based maritime visible light communication
Hyeong-Ji Kim, Samrat Vikramaditya Tiwari, and Yeon-Ho Chung
This Letter presents a multi-hop relay visible light communication (VLC) system for maritime applications. Maritime VLC systems suffer from limited coverage distance due inherently to the usage of light-emitting diodes and photodetectors. The proposed system employs a multiple of decode-and-forward relays to extend covThis Letter presents a multi-hop relay visible light communication (VLC) system for maritime applications. Maritime VLC systems suffer from limited coverage distance due inherently to the usage of light-emitting diodes and photodetectors. The proposed system employs a multiple of decode-and-forward relays to extend coverage distance in maritime environments. The multi-hop relay based maritime VLC is analyzed under a maritime channel modeled by the JONSWAP spectrum and gamma–gamma distribution. It is found that the use of relays in maritime environments can extend the coverage distance significantly and also improve the performance. In addition, the performance of the system is analyzed using various combining techniques at the receiver to enhance the performance. The maximal ratio combining technique is found to provide superior link quality in maritime environments..
Chinese Optics Letters
- Publication Date: May. 10, 2016
- Vol. 14, Issue 5, 050607 (2016)
Direct-detection OFDM-QPSK system performance improvement enabled by DFT spread and receiver-based ISFA algorithm
Jie Su, Xinying Li, and Jianjun Yu
We experimentally demonstrate a direct-detection orthogonal-frequency-division-multiplexing quadrature-phase-shift-keying (OFDM-QPSK) system that is capable of delivering a 32 Gbaud OFDM-QPSK signal over 7 km single-mode fiber-28 (SMF-28). Intra-symbol frequency-domain averaging (ISFA) channel response estimation is apWe experimentally demonstrate a direct-detection orthogonal-frequency-division-multiplexing quadrature-phase-shift-keying (OFDM-QPSK) system that is capable of delivering a 32 Gbaud OFDM-QPSK signal over 7 km single-mode fiber-28 (SMF-28). Intra-symbol frequency-domain averaging (ISFA) channel response estimation is applied to suppress in-band noise, while discrete Fourier transform-spread (DFT-spread) is used to reduce the peak-to-average power ratio (PAPR) of the transmitted OFDM signal. With the aid of ISFA-based channel estimation and PAPR reduction enabled by DFT-spread, the bit-error ratio of the system after 7 km SMF-28 transmission can be improved from 2 × 10 3 8.5 dBm
Chinese Optics Letters
- Publication Date: May. 10, 2016
- Vol. 14, Issue 5, 050608 (2016)
Imaging Systems
Highly efficient mid-infrared metasurface based on metallic rods and plate
Qian Sun, Shuming Wang, Hui Liu, and Shining Zhu
Metasurface is a new kind of 2D metamaterial that is able to manage a variety of light beam modulations through steering the phase of the scattering waves. In this work, we utilize the metasurface to manipulate the light beam in the mid-infrared regime. By using the metallic rod and the plate structure, the metasurfaceMetasurface is a new kind of 2D metamaterial that is able to manage a variety of light beam modulations through steering the phase of the scattering waves. In this work, we utilize the metasurface to manipulate the light beam in the mid-infrared regime. By using the metallic rod and the plate structure, the metasurface presents a high polarization conversion efficiency and a wide working bandwidth. With specially rotated metallic rods, the metasurface can realize various light beam manipulations, such as negative reflection, beam collimation, and focusing. All of these results show that such a metasurface will have potential applications in future mid-infrared optics..
Chinese Optics Letters
- Publication Date: May. 10, 2016
- Vol. 14, Issue 5, 051101 (2016)
Materials
Preliminary study of the damage resistance of type I doubler KDP crystals at 532 nm
Yinbo Zheng, Lei Ding, Xinda Zhou, Rongsheng Ba... and Wanguo Zheng|Show fewer author(s)
This Letter is concerned with the influence of polarization on the damage performance of type I doubler potassium dihydrogen phosphate crystals grown by the conventional growth method under 532 nm pulse irradiation. Pinpoint density (ppd) and the size distribution of pinpoints are extracted through light scattering picThis Letter is concerned with the influence of polarization on the damage performance of type I doubler potassium dihydrogen phosphate crystals grown by the conventional growth method under 532 nm pulse irradiation. Pinpoint density (ppd) and the size distribution of pinpoints are extracted through light scattering pictures captured by microscope. The results show that the ppd of polarization that parallels the extraordinary axis is around 1.5 ×
Chinese Optics Letters
- Publication Date: May. 10, 2016
- Vol. 14, Issue 5, 051601 (2016)
Investigation of low-temperature cathodoluminescence mechanism of Er-doped GaN thick films by ion implantation
Xiaodan Wang, Yajuan Mo, Xionghui Zeng, Hongmin Mao... and Ke Xu|Show fewer author(s)
Er ions are implanted into the GaN thick films grown by hydride vapor phase epitaxy. The implantation energy is 200 keV and the implantation doses are 1×1013, 1×1014, 1×1015, and 5×1015 atom/cm2, respectively. The effects of the implantation dose and annealing temperature on the GaN band-edge lumineEr ions are implanted into the GaN thick films grown by hydride vapor phase epitaxy. The implantation energy is 200 keV and the implantation doses are 1 × 10 13 1 × 10 14 1 × 10 15 5 × 10 15 atom / cm 2 1 × 10 15 atom / cm 2 H 11 / 2 2 → I 15 / 2 4 S 3 / 2 4 → I 15 / 2 4
Chinese Optics Letters
- Publication Date: May. 10, 2016
- Vol. 14, Issue 5, 051602 (2016)
Fabrication and characteristics of silicon-rich oxide thin films with controllable compositions
Shiyu Zhang, Quanjun Pan, Xu Fang, Kening Mao, and Hui Ye
Silicon-rich oxide films with controllable optical constants and properties are deposited by the reactive magnetron sputtering method on a Si target. The O/Si atomic ratio x of SiOx is tuned from 0.12 to 1.84 by adjusting the oxygen flow rate, which is found to be a more effective way to obtain SiOx films compared withSilicon-rich oxide films with controllable optical constants and properties are deposited by the reactive magnetron sputtering method on a Si target. The O/Si atomic ratio x SiO x SiO x O 2 / ( Ar + O 2 ) SiO x x SiO x
Chinese Optics Letters
- Publication Date: May. 10, 2016
- Vol. 14, Issue 5, 051603 (2016)
Optical Design and Fabrication
Parallel fabrication of silicon concave microlens array by femtosecond laser irradiation and mixed acid etching
An Pan, Tao Chen, Cunxia Li, and Xun Hou
A method of multi-beam femtosecond laser irradiation combined with modified HF-HNO3-CH3COOH etching is used for the parallel fabrication of all-silicon plano-concave microlens arrays (MLAs). The laser beam is split by a diffractive optical element and focused by a lens to drill microholes parallely on silicon. An HF-HNA method of multi-beam femtosecond laser irradiation combined with modified HF - HNO 3 - CH 3 COOH HF - HNO 3 - H 2 SO 4 - CH 3 COOH HF - HNO 3 - CH 3 COOH H 2 SO 4
Chinese Optics Letters
- Publication Date: May. 10, 2016
- Vol. 14, Issue 5, 052201 (2016)
Spectroscopy
Study on low-temperature heat treatment of purplish red sapphire
Xiaozhen Han, Yan Kang, Xiao Wu, Xueliang Liu, and Shouguo Guo
A light purplish red sapphire is heat treated in an airtight crucible. The sample changes little in color after receiving heat treatment at 1100°C, but turns to light blue and blue after being treated at 1200°C and 1300°C, respectively. Before heating, the UV-VIS absorption spectra of the sample are domiA light purplish red sapphire is heat treated in an airtight crucible. The sample changes little in color after receiving heat treatment at 1100°C, but turns to light blue and blue after being treated at 1200°C and 1300°C, respectively. Before heating, the UV-VIS absorption spectra of the sample are dominated by the 551 nm broad absorption band contributed by the d A 2 4 → T 2 4 Cr 3 + Fe 2 + Ti 4 + Fe 2 + Ti 4 + Fe 2 + Ti 4 + Fe 2 + Ti 4 +
Chinese Optics Letters
- Publication Date: May. 10, 2016
- Vol. 14, Issue 5, 053001 (2016)
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