Wavelength adjustability of frequency conversion light of Yb-doped fiber laser based on FBGs

Kazuma Dobashi; Yasuhiro Tomihari; Koichi Imai; Junji Hirohashi; Satoshi Makio

doi:10.1117/12.2288045

15 February 2018 Wavelength adjustability of frequency conversion light of Yb-doped fiber laser based on FBGs

Kazuma Dobashi, Yasuhiro Tomihari, Koichi Imai, Junji Hirohashi, Satoshi Makio

Proceedings Volume 10516, Nonlinear Frequency Generation and Conversion: Materials and Devices XVII; 105161I (2018) https://doi.org/10.1117/12.2288045
Event: SPIE LASE, 2018, San Francisco, California, United States

Abstract

We focused on wavelength conversion of simple and compact CW Yb-Doped fiber laser based on FBGs with wavelength adjustable function. By controlling temperatures of FBGs in fiber laser, it was possible to tune oscillated wavelength from 1064.101 nm to 1064.414 nm with more than 20 W in CW operation mode. Based on this fundamental light, frequency converted light (SHG and THG) were generated by utilizing two PP:Mg-SLT devises. We obtained more than 3 W of SHG light with tuning range of 150 pm and more than 35 mW of THG with tuning range of 100 pm. By selecting FBG grating and QPM grating properly, we can realize adjustable wavelength laser with the same scheme from 1040 nm to 1090 nm and their SHG/THG. With this combination of FBG based fiber laser and QPM devices, it is possible to tune the wavelength just by temperature tuning without any changes of beam shape and beam pointing.

Citation Download Citation

Kazuma Dobashi, Yasuhiro Tomihari, Koichi Imai, Junji Hirohashi, and Satoshi Makio "Wavelength adjustability of frequency conversion light of Yb-doped fiber laser based on FBGs", Proc. SPIE 10516, Nonlinear Frequency Generation and Conversion: Materials and Devices XVII, 105161I (15 February 2018); https://doi.org/10.1117/12.2288045

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KEYWORDS

Fiber Bragg gratings

Fiber lasers

Second-harmonic generation

Frequency conversion

Reflectivity

Beam shaping

Continuous wave operation

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