Theoretical analysis of mutual injection mechanism in spectral beam combining diode laser array

Xu Ruan; Huicheng Meng; Zhao Wang; Hao Tan; Shujuan Sun; Deyong Wu; Deyuan Shen; Kai Zhang

doi:10.1117/1.OE.56.12.126104

7 December 2017 Theoretical analysis of mutual injection mechanism in spectral beam combining diode laser array

Xu Ruan, Huicheng Meng, Zhao Wang, Hao Tan, Shujuan Sun, Deyong Wu, Deyuan Shen, Kai Zhang

Author Affiliations +

Optical Engineering, Vol. 56, Issue 12, 126104 (December 2017). https://doi.org/10.1117/1.OE.56.12.126104

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.

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Xu Ruan, Huicheng Meng, Zhao Wang, Hao Tan, Shujuan Sun, Deyong Wu, Deyuan Shen, and 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

Received: 16 August 2017; Accepted: 20 November 2017; Published: 7 December 2017

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