Lijuan Wei, Jian Cao, Qingmao Zhang, Guohua Zeng, Jinxing Wu, Xiang Gao, Mingming Hao. Frequency Doubling of Fiber Laser Based on Narrow Linewidth Grating[J]. Laser & Optoelectronics Progress, 2021, 58(19): 1914010
- Laser & Optoelectronics Progress
- Vol. 58, Issue 19, 1914010 (2021)
Fig. 1. Schematic diagram of frequency doubling device of continuous fiber laser
Fig. 2. Spectrum of narrow bandwidth grating
Fig. 3. Experimental results of fiber laser based on common commercial grating
Fig. 4. Fundamental frequency laser is divided into two beams with almost equal power, namely s-polarized laser and p-polarized laser
Fig. 5. Powers of p-polarized light and s-polarized light varying with current
Fig. 6. Frequency doubling of p-polarized laser (532 nm green laser is obtained with 7.3 W power)
Fig. 7. 532 nm green laser is obtained with 11.6 W power when fundamental laser source is natural light
Fig. 8. Variation of 532 nm green laser power with current and change of frequency doubling efficiency with current. (a) Using p-polarized laser as frequency doubling source; (b) after removing PBS and half wave plate
Fig. 9. Spectra of fundamental frequency laser from different lasers. (a) Narrow bandwidth fiber laser; (b) common commercial fiber laser
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