Multimode vertical cavity surface emitting laser having narrow laser light emitting angle

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United States of America Patent

PATENT NO 9025634
SERIAL NO

13951872

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Abstract

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The protective film that covers the top distributed Bragg reflecting mirror has a central region and a peripheral region. The central region has a protrusion that projects relative to the peripheral region in a direction in which the laser light is emitted. The VCSEL satisfies relations below:

description='In-line Formulae' end='lead'dp×n=(N/2)×λ, anddescription='In-line Formulae' end='tail'

description='In-line Formulae' end='lead'dc×n=dp×n+(1/4+M/2)×λ,description='In-line Formulae' end='tail'

    whereλ is a wavelength of the laser light in vacuum;dc is a film thickness of the protective film in the central region;dp is a film thickness of the protective film in the peripheral region;n is a refractive index of the protective film (wherein a refractive index of air

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Patent Owner(s)

Patent OwnerAddress
CLOUD LIGHT TECHNOLOGY LIMITED3/F SAE TECHNOLOGY CENTRE 6 SCIENCE PARK EAST AVENUE HONG KONG SCIENCE PARK SHATIN N T HONG KONG

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Tamanuki, Takemasa Hong Kong, CN 18 88

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