12 March 2024 High-power eight-wavelength distributed feedback laser array with 100 GHz spacing using grating reflector
Zhenzhen Xu, Zhenxing Sun, Jie Zhao, Xiangfei Chen
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Abstract

We propose and experimentally demonstrate a high-power eight-wavelength distributed feedback (DFB) laser array with 100 GHz spacing using the grating reflector (GR). The GR, which is a uniform sampled grating, can provide light reflection instead of high reflection (HR) facet coating. Thus, the front and rear facets are both coated with anti-reflection coatings (AR/AR) to avoid the influence of a random grating phase at the HR facet. Therefore, more output power, better single-longitudinal-mode operation, and higher wavelength precision can be simultaneously achieved, compared with traditional DFB lasers with HR/AR facet coatings. The maximum output power and side mode suppression ratio of the fabricated eight-channel GR-DFB laser array as high as 70 mW and 55 dB can be achieved, which may benefit wavelength division multiplexing transmission systems, gas sensors, optical computing systems, and microwave photonic signal processing.

© 2024 Society of Photo-Optical Instrumentation Engineers (SPIE)
Zhenzhen Xu, Zhenxing Sun, Jie Zhao, and Xiangfei Chen "High-power eight-wavelength distributed feedback laser array with 100 GHz spacing using grating reflector," Optical Engineering 63(3), 036104 (12 March 2024). https://doi.org/10.1117/1.OE.63.3.036104
Received: 9 January 2024; Accepted: 22 February 2024; Published: 12 March 2024
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KEYWORDS
High power lasers

Optical gratings

Laser processing

Reflectors

Detector arrays

Reflection gratings

Laser stabilization

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