980 nm Yb-doped single-mode fiber laser and its frequency-doubling with BIBO

A Q-Switched 980 nm Yb-Doped Single-Mode Fiber Amplifier and Its Frequency Doubling

“…The optical conversion efficiency from 980nm to 490.8 nm was 5.3%. It was higher than that of the cw emission system, for which the optical conversion efficiency was only 1%~2% [14]. …”

“…The BIBO crystal (3×3×10mm 3 LBO and about 1.6 times higher than BBO. Its walk-off angle, angular and spectral acceptance bandwidths are all appropriate to the experiment [14]. Through frequency doubling, a bluegreen laser source at 490.8 nm was obtained with the linewidth of 0.5 nm as shown in Fig.…”

“…The output beam of this laser is near diffraction limited since the fiber is single-mode by nature and only supports the fundamental mode. Besides, the intensity profile of output laser beam has been measured in the cw 980nm fiber laser, which was nearly diffraction-limited with M 2 ~1.1 [14]. …”

978 nm 1.24 ps ultra-short plused large mode area photonic crystal fiber laser

“…980 nm fiber laser has a significant application which is important for generation the blue-green sources through frequency-doubled to 488-490 nm light, and has been also widely reported pumping Er-doped fiber amplifiers/lasers thanks to their excellent beam quality, small volume and simpler thermal management [4][5][6]. To obtain high output power fiber laser in continuous-wave (CW) regime emitting at 980 nm, large mode area photonic crystal fiber (LMA-PCF) is invented, and as a result the output power can scale from milliwatt to hectowatt magnitude.…”

Yb^3+-doped double-clad phosphate fiber for 976 nm single-frequency laser amplifiers

“…Various single-frequency fiber lasers and amplifiers operating at different wavelengths have been developed for many applications mentioned above. In recent years, high power singlefrequency fiber laser sources at 976 nm have garnered great interest because they can be used as low-noise pump sources for core-pumped ytterbium (Yb 3+ )-or erbium (Er 3+ )-doped lasers and amplifiers [4] and nonlinear frequency converters to generate coherent visible and UV radiation [5][6][7][8].…”