Fiber-coupled high power laser diode by wavelength multiplexing

Ye Ding; Yonggang Zou; Liang Jin; Henan Chen; Xiaohui Ma

doi:10.1117/12.2054145

21 February 2014 Fiber-coupled high power laser diode by wavelength multiplexing

Ye Ding, Yonggang Zou, Liang Jin, Henan Chen, Xiaohui Ma

Proceedings Volume 9142, Selected Papers from Conferences of the Photoelectronic Technology Committee of the Chinese Society of Astronautics: Optical Imaging, Remote Sensing, and Laser-Matter Interaction 2013; 91420G (2014) https://doi.org/10.1117/12.2054145
Event: Selected Proceedings of the Photoelectronic Technology Committee Conferences held July-December 2013, 2013, SuZhou, China

Abstract

In this paper, the laser diode (LD) fiber coupling method based on the wavelength multiplexing technique is used. Two different wavelengths of beams from two high power laser diodes are coupled into a single multi-mode fiber via collimating, wavelength combining, focusing and coupling to achieve high efficiently high power output. The output light beam from LD is collimated by using a section of the optical fiber with a diameter of 200μm. According to the basic principle of wavelength multiplexing, the wavelength coupling device is designed. The focusing lens set is designed with the related technical data of fiber and LD. And, two diode laser beams at 808nm and 980nm, light-emitting area of 100μm×1μm, output power of 2W（CW）LDs are coupled into a multi-mode fiber by the above method, with a core diameter of 100μm and a numberical aperture (NA) of 0.22. In the current work, for 808 nm LD and 980 nm LD at a operation current of 2.5 A, the total continuous power output is 4.05 W while the continuous power output is 3.25 W for the optical fiber laser, which gives a total coupling efficiency of as high as 80%.

Citation Download Citation

Ye Ding, Yonggang Zou, Liang Jin, Henan Chen, and Xiaohui Ma "Fiber-coupled high power laser diode by wavelength multiplexing", Proc. SPIE 9142, Selected Papers from Conferences of the Photoelectronic Technology Committee of the Chinese Society of Astronautics: Optical Imaging, Remote Sensing, and Laser-Matter Interaction 2013, 91420G (21 February 2014); https://doi.org/10.1117/12.2054145

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KEYWORDS

Semiconductor lasers

Multiplexing

Fiber lasers

Optical fibers

Diodes

Reflectivity

Fiber coupled lasers

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