Coherent tuning of semiconductor laser wavelength

Sahnggi Park; Ki Soo Kim; Su Hwan Oh; Hyunsung Ko; Moon-Ho Park

doi:10.1117/1.2150380

1 January 2006 Coherent tuning of semiconductor laser wavelength

Sahnggi Park, Ki Soo Kim, Su Hwan Oh, Hyunsung Ko, Moon-Ho Park

Author Affiliations +

Optical Engineering, Vol. 45, Issue 1, 014202 (January 2006). https://doi.org/10.1117/1.2150380

Abstract

Coherent laser light was tuned by cumulative refraction of light waves in a semiconductor laser cavity, while the wavelength of electroluminescence was not tuned by any noticeable amount. This effect is explained by the fact that the laser light has perfect spatial coherence, while the electroluminescence has a spatial coherence of ≈ 0.7 µm, smaller than the width of the wavefront. The refraction angle of 2.4 deg means that more than 16 triangular electrodes are involved in the refraction. This observation of coherent tuning may lead to a new optoelectronic device, a coherent filter, which filters out only coherent light from a coherent-incoherent mixture.

©(2006) Society of Photo-Optical Instrumentation Engineers (SPIE)

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Sahnggi Park, Ki Soo Kim, Su Hwan Oh, Hyunsung Ko, and Moon-Ho Park "Coherent tuning of semiconductor laser wavelength," Optical Engineering 45(1), 014202 (1 January 2006). https://doi.org/10.1117/1.2150380

Published: 1 January 2006

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KEYWORDS

Waveguides

Semiconductor lasers

Electrodes

Refraction

Refractive index

Electroluminescence

Spatial coherence

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