Tapered laser diode with linearly effective-refractive-index variation waveguide

Duchang Heo; Yun-Seok Kwak; Tae-kyung Kim; Young-Wook Choi

doi:10.1117/12.2080439

1 April 2015 Tapered laser diode with linearly effective-refractive-index variation waveguide

Duchang Heo, Yun-Seok Kwak, Tae-kyung Kim, Young-Wook Choi

Proceedings Volume 9348, High-Power Diode Laser Technology and Applications XIII; 934813 (2015) https://doi.org/10.1117/12.2080439
Event: SPIE LASE, 2015, San Francisco, California, United States

Abstract

We investigated a novel design concept of index-guided tapered LDs with linearly effective-refractive-index variation to make a quality beam in 808 nm for intermediate power LDs between a few decades of mW to ~ W. In this concept, the tapered width at each position in the propagation direction varies linearly depending on change in effective-refractive-index not geometry. We use GaAsP/InGaP/InGaAlP quantum well LD structure of 808 nm and standard LD fabrication processes to test. To design a detail structure, we use the effective-refractive-index method and transfer matrix method. The tapered ridge LD with linear effective-refractive-index variation shows more stable in beam quality but needs more study to optimize the structure.

Citation Download Citation

Duchang Heo, Yun-Seok Kwak, Tae-kyung Kim, and Young-Wook Choi "Tapered laser diode with linearly effective-refractive-index variation waveguide", Proc. SPIE 9348, High-Power Diode Laser Technology and Applications XIII, 934813 (1 April 2015); https://doi.org/10.1117/12.2080439

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