Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/90317
Title: Electrically pumped semiconductor laser with low spatial coherence and directional emission
Authors: Kim, Kyungduk
Bittner, Stefan
Zeng, Yongquan
Liew, Seng Fatt
Wang, Qijie
Cao, Hui
Keywords: Optical Resonators
Semiconductor Lasers
Engineering::Electrical and electronic engineering
Issue Date: 2019
Source: Kim, K., Bittner, S., Zeng, Y., Liew, S. F., Wang, Q., & Cao, H. (2019). Electrically pumped semiconductor laser with low spatial coherence and directional emission. Applied Physics Letters, 115(7), 071101-. doi:10.1063/1.5109234
Series/Report no.: Applied Physics Letters
Abstract: We design and fabricate an on-chip laser source that produces a directional beam with low spatial coherence. The lasing modes are based on the axial orbit in a stable cavity and have good directionality. To reduce the spatial coherence of emission, the number of transverse lasing modes is maximized by fine-tuning the cavity geometry. In a cavity with the size of hundreds of micrometers, 1000 transverse modes lase simultaneously and independently, reducing the speckle contrast to 0.03. Decoherence is reached in a few nanoseconds as a result of frequency detuning of lasing modes. Such rapid decoherence will facilitate applications in ultrafast speckle-free full-field imaging.
URI: https://hdl.handle.net/10356/90317
http://hdl.handle.net/10220/49906
ISSN: 0003-6951
DOI: http://dx.doi.org/10.1063/1.5109234
Rights: © 2019 The Author(s). All rights reserved. This paper was published by AIP Publishing in Applied Physics Letters and is made available with permission of The Author(s).
Fulltext Permission: embargo_20200819
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles

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