7 December 2017 Theoretical analysis of mutual injection mechanism in spectral beam combining diode laser array
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Abstract
We present an analytical study on the mutual injection mechanism of a spectral beam combining elements using ray tracing and diffraction integrals. We elucidate how mutual injection degrades the beam quality of combined lasers, while the feedback interinjection of the emitters oscillates in an external cavity. Because of the grating diffraction and feedback from the output plane mirror, the mutual injection beam establishes a stable positive feedback between the two emitters. The proposed theoretical model is also verified experimentally by comparing the output under different conditions.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
Xu Ruan, Xu Ruan, Huicheng Meng, Huicheng Meng, Zhao Wang, Zhao Wang, Hao Tan, Hao Tan, Shujuan Sun, Shujuan Sun, Deyong Wu, Deyong Wu, Deyuan Shen, Deyuan Shen, Kai Zhang, Kai Zhang, } "Theoretical analysis of mutual injection mechanism in spectral beam combining diode laser array," Optical Engineering 56(12), 126104 (7 December 2017). https://doi.org/10.1117/1.OE.56.12.126104 . Submission: Received: 16 August 2017; Accepted: 20 November 2017
Received: 16 August 2017; Accepted: 20 November 2017; Published: 7 December 2017
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