Dual line CW fiber laser module based on FBG combination

Kazuma Dobashi; Masayuki Hoshi; Junji Hirohashi; Satoshi Makio

doi:10.1117/12.2288061

26 February 2018 Dual line CW fiber laser module based on FBG combination

Kazuma Dobashi, Masayuki Hoshi, Junji Hirohashi, Satoshi Makio

Proceedings Volume 10512, Fiber Lasers XV: Technology and Systems; 1051225 (2018) https://doi.org/10.1117/12.2288061
Event: SPIE LASE, 2018, San Francisco, California, United States

Abstract

We developed the dual line fiber laser module based on FBG combination. The proposed configuration has several advantages such as compact, simple, and inexpensive. The laser was composed pump LD (40W), two HR FBGs for 1053 nm and 1058 nm, Yb-doped fiber, two OC FBGs for 1053 nm and 1058 nm, and delivery fiber. All single mode fibers were polarization maintained with approximately 6 micron core. All FBGs were mounted on holders with TECs and their temperatures were controlled independently. The center wavelengths of HR and OC FBGs were temperature dependent and their shifts are approximately 7 nm/degree-C for all integrated FBG. By adjusting the temperature, it is possible to realize the resonant condition for only 1053 nm or only for 1058 nm. Based on this configuration, we demonstrated dual line CW fiber laser module. This module was compact with the size of 200 mm X 150 mm X 23 mm. By adjusting the FBG temperatures, we obtained the output power of more than 10 W at 1053 nm and 1058 nm with linear polarization.

Citation Download Citation

Kazuma Dobashi, Masayuki Hoshi, Junji Hirohashi, and Satoshi Makio "Dual line CW fiber laser module based on FBG combination", Proc. SPIE 10512, Fiber Lasers XV: Technology and Systems, 1051225 (26 February 2018); https://doi.org/10.1117/12.2288061

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