Packaging of wavelength stabilized 976nm 100W 105µm 0.15 NA fiber coupled diode lasers

Xiaochen Jiang; Rui Liu; Yanyan Gao; Tujia Zhang; Xiaoguang He; Jing Zhu; Qiang Zhang; Thomas Yang; Cuipeng Zhang

doi:10.1117/12.2212139

22 April 2016 Packaging of wavelength stabilized 976nm 100W 105µm 0.15 NA fiber coupled diode lasers

Xiaochen Jiang, Rui Liu, Yanyan Gao, Tujia Zhang, Xiaoguang He, Jing Zhu, Qiang Zhang, Thomas Yang, Cuipeng Zhang

Proceedings Volume 9730, Components and Packaging for Laser Systems II; 97300I (2016) https://doi.org/10.1117/12.2212139
Event: SPIE LASE, 2016, San Francisco, California, United States

Abstract

Fiber coupled diode lasers are widely used in many fields now especially as pumps in fiber laser systems. In many fiber laser applications, high brightness pumps are essential to achieve high brightness fiber lasers. Furthermore, 976nm wavelength absorption band is narrow with Yb³⁺ doped fiber lasers which is more challenging for controlling wavelength stabilized in diode laser modules. This study designed and implemented commercial available high brightness and narrow wavelength width lasers to be able to use in previous mentioned applications. Base on multiple single emitters using spatial and polarization beam combining as well as fiber coupling techniques, we report a wavelength stabilized, 105μm NA 0.15 fiber coupled diode laser package with 100W of optical output power at 976 nm, which are 14 emitters inside each multiple single emitter module. The emitting aperture of the combined lasers output are designed and optimized for coupling light into a 105μm core NA 0.15 fiber. Volume Bragg grating technology has been used to improve spectral characteristics of high-power diode lasers. Mechanical modular design and thermal simulation are carried out to optimize the package. The spectral width is roughly 0.5 nm (FWHM) and the wavelength shift per °C < 0.02nm. The output spectrum is narrowed and wavelength is stabilized using Volume Bragg gratings (VBGs). The high brightness package has an electrical to optical efficiency better than 45% and power enclosure more than 90% within NA 0.12. Qualification tests have been included on this kind of package. Mechanical shock, vibration and accelerated aging tests show that the package is reliability and the MTTF is calculated to be more than 100k hours at 25°C.

Citation Download Citation

Xiaochen Jiang, Rui Liu, Yanyan Gao, Tujia Zhang, Xiaoguang He, Jing Zhu, Qiang Zhang, Thomas Yang, and Cuipeng Zhang "Packaging of wavelength stabilized 976nm 100W 105µm 0.15 NA fiber coupled diode lasers", Proc. SPIE 9730, Components and Packaging for Laser Systems II, 97300I (22 April 2016); https://doi.org/10.1117/12.2212139

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