Fig. 1. Phase locking based on time division multiple access^[38]

Fig. 2. Phase locking based on code division multiple access^[40]

Fig. 3. Illustration of fiber structure. (a) Confined-doped fiber; (b) Single-trench fiber; (c) Polarization-maintaining fiber; (d) Tapered fiber

Fig. 4. Illustration of pulsed fiber laser shape manipulation

Fig. 5. Illustration of fiber laser characteristic manipulation

Fig. 6. (a) Schematic diagram of pattern decomposition principle based on deep learning; (b) Application example diagram of pattern decomposition based on deep learning^[69]

Fig. 7. (a) Pulsed Yb-doped fiber laser device based on black phosphorus; The results of pulse long time stability test: (b) Change of spectrum; (c) Fluctuation of output power; (d) Change of pulse width and repetition frequency^[87]

Fig. 8. Output pulse performance of ultrafast pulse fiber laser based on the CsCu₂I₃-SA. (a) Recorded RF spectrum within the 500 MHz range; (b) RF spectrum within the 50 MHz range; (c) Central wavelength and 3 dB bandwidth and (d) repetition rate and pulse train interval as a function of pump power; The changes of (e) the central wavelength and 3 dB bandwidth, and (f) the output power and the pulse train interval within 164 days under the same pump power