Author(s): Xu, LH (Xu, Linhai); Wang, YF (Wang, Yufei); Jia, YF (Jia, Yufei); Liu, LJ (Liu, Lingjuan); Shi, T (Shi, Tao); Zheng, WH (Zheng, Wanhua)

Source: IEEE PHOTONICS TECHNOLOGY LETTERS Volume: 33 Issue: 23 Pages: 1329-1332 DOI: 10.1109/LPT.2021.3118366 Published: DEC 1 2021

Abstract: By simulating the dependence of laser directionality and the possibility of multimode lasing on the sidewall angle of Aquarius-shaped cavity, we achieved the optimized parameters for low-coherence and high-directivity laser output. The measured divergence angle, the speckle contrast, and the output power are 7.2 degrees, 4.53 %, 700 mW@4 A, respectively, in the experiment. Then we introduced patterned electrode on the P-side of the laser, and obtained adjustable coherence with the switched speckle contrast between 4.8 % and 27.8 %. This highly directional and adjustable coherence on-chip complex cavity laser prospectively offers a new choice for biological imaging.

Accession Number: WOS:000709067300005

ISSN: 1041-1135

eISSN: 1941-0174

Full Text: https://ieeexplore.ieee.org/document/9562481