Optically pumped tunable VCSEL employing geometric isolation

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United States of America Patent

PATENT NO 11749962
APP PUB NO 20210175683A1
SERIAL NO

17147691

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Abstract

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An optically pumped tunable VCSEL swept source module has a VCSEL and a pump, which produces light to pump the VSCEL, wherein the pump is geometrically isolated from the VCSEL. In different embodiments, the pump is geometrically isolated by defocusing light from the pump in front of the VCSEL, behind the VCSEL, and/or by coupling the light from the pump at an angle with respect to the VCSEL. In the last case, angle is usually less than 88 degrees. There are further strategies for attacking pump noise problems. Pump feedback can be reduced through (1) Faraday isolation and (2) geometric isolation. Single frequency pump lasers (Distributed feedback lasers (DFB), distributed Bragg reflector lasers (DBR), Fabry-Perot (FP) lasers, discrete mode lasers, volume Bragg grating (VBG) stabilized lasers can eliminate wavelength jitter and amplitude noise that accompanies mode hopping.

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Patent Owner(s)

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EXCELITAS TECHNOLOGIES CORP200 WEST STREET WALTHAM MA 02451

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Atia, Walid A Jamaica Plain, US 68 1049
Johnson, Bartley C North Andover, US 46 1134
Kuznetsov, Mark E Lexington, US 57 1218
Mallon, Edward J Marshfield, US 2 7
Whitney, Peter S Bedford, US 43 592

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