Highly efficient 9xx-nm band single emitter laser diodes optimized for high output power operation

Yuji Yamagata; Yoshikazu Kaifuchi; Ryozaburo Nogawa; Kyohei Yoshida; Rintaro Morohashi; Masayuki Yamaguchi

doi:10.1117/12.2545721

2 March 2020 Highly efficient 9xx-nm band single emitter laser diodes optimized for high output power operation

Yuji Yamagata, Yoshikazu Kaifuchi, Ryozaburo Nogawa, Kyohei Yoshida, Rintaro Morohashi, Masayuki Yamaguchi

Proceedings Volume 11262, High-Power Diode Laser Technology XVIII; 1126203 (2020) https://doi.org/10.1117/12.2545721
Event: SPIE LASE, 2020, San Francisco, California, United States

Abstract

We report the highest power conversion efficiency (PCE) of 74.6% at peak and more than 70% PCE maintained up to high output power of 20W in broad stripe laser diodes (LDs) lasing at a 9xx-nm band. Optimal layer structure design including enhancement of asymmetry in waveguide structure and elimination of nonlinear resistance due to band discontinuity enables electric resistance to be reduced by 33% compared to conventional LDs without notable increase in optical internal loss. These PCE values from middle to high output power range marks the highest record reported so far.

Citation Download Citation

Yuji Yamagata, Yoshikazu Kaifuchi, Ryozaburo Nogawa, Kyohei Yoshida, Rintaro Morohashi, and Masayuki Yamaguchi "Highly efficient 9xx-nm band single emitter laser diodes optimized for high output power operation", Proc. SPIE 11262, High-Power Diode Laser Technology XVIII, 1126203 (2 March 2020); https://doi.org/10.1117/12.2545721

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