DUAL WAVELENGTH LASING DEVICE
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United States of America Patent
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Issued Date -
Oct 8, 2015
app pub date -
Sep 17, 2013
filing date -
Oct 1, 2012
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Abstract
A semiconductor lasing device (10) for emitting radiation at multiple distinct wavelengths, the device (10) comprising an active layer (16) having first portion (20) and a second portion (21), the first and second portions (20, 21) being separated by a Bragg grating (19) extending through the entire depth of the active layer (16), the first portion (20) defining a first lasing cavity (29) for emitting electromagnetic radiation at a first wavelength λ1 and the first and second portions (20, 21) together defining a second lasing cavity (31) for emitting electromagnetic radiation at a second wavelength λ2.
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