Yang Liu, Qian Cao, Xincai Diao, Zhiyi Wei, Guoqing Chang. Longwave mid-IR femtosecond pulse sources driven by ultrafast fiber lasers (Invited)[J]. Infrared and Laser Engineering, 2021, 50(8): 20210368
- Infrared and Laser Engineering
- Vol. 50, Issue 8, 20210368 (2021)
Fig. 1. Four wavelength range in mid-IR spectrum
Fig. 2. Schematic diagram of a system for generating mid-IR pulses based on inter-pulse DFG
Fig. 3. DFG in 2 mm GaSe
Fig. 4. Effects of (a) E p, (b) E s and (c) L on idler pulse energy driven DFG in 1.03 µm
Fig. 5. (a) Group velocity mismatch in 1.03 and 2 µm driven DFG and (b), (c) 2 µm driven DFG in 4 mm GaSe
Fig. 6. Effects of (a) E p, (b) E s and (c) L on idler pulse in 2 µm driven DFG
Fig. 7. Principle of SESS. (a) After passing the 6 cm fiber, femtosecond pulses could be generated by filtering out the leftmost and rightmost sidelobes of the spectrum; (b) Evolution of pulse spectrum with fiber length
Fig. 8. Principle of SESS
Fig. 9. Growth process of OP-GaAs[12]
Fig. 10. State-of-the-art long wave mid-IR fiber laser sources based on inter-pulse DFG
Fig. 11. (a) Measured pulse energy(blue dotted curve) and duration(black dotted curve) for the pulses resulting from the filtered spectral lobes at 1.1-1.2 μm. (b) Measured spectra and average power for mid-IR pulses generated in 2 mm GaSe
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Table 1. Several of the most widely used or most promising new mid-IR non-oxide crystals
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Table 2. Summary of ultrafast fiber laser driven DFG to obtain long-wave mid-IR light source
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