Patent
Semiconductor laser end-facet coatings for use in solid or liquid environments
G.A. Garcia,Steven J. Cowen +1 more
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TLDR
In this article, an improvement for a semiconductor laser allows the facet reflectivity to be modified to compensate for the presence of a liquid or transparent solid medium having an index of refraction n m.Abstract:
An improvement for a semiconductor laser allows the facet reflectivity to be modified to compensate for the presence of a liquid or transparent solid medium having an index of refraction n m . A first dielectric coating is disposed on an end-facet of the semiconductor laser and has an index of refraction n 1 . A second dielectric coating is disposed on the first dielectric coating and has an index of refraction n 2 . The materials of the dielectric coatings are selected such that the fraction n 1 /n 2 =√n m . Thus the problems associated with reductions of laser facet reflectivity due to being in contact with a surrounding medium which optically is very different from air is overcome.read more
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Patent
Encapsulated optoelectronic devices with controlled properties
TL;DR: In this article, a VCSEL is disclosed whose transmission does not change upon encapsulation by a material such as plastic, epoxy or other suitable encapsulant with a known index of refraction.
Patent
Semiconductor devices incorporating multilayer interference regions
TL;DR: A semiconductor high reflector comprising a number of thin alternating layers of semiconductor materials is electrically tunable and may be used as a temperature insensitive semiconductor laser in a Fabry-Perot configuration.
Patent
Semiconductor laser device capable of suppressing leakage current in a light emitting end surface and method for manufacturing same
TL;DR: In this paper, an electrode comprising Au is patterned so that the electrode does not exist in the vicinity of a light emitting end surface, and an insulating film is formed on the electrode for preventing the Si in the protective coating on the end surface from contacting with Au in the electrode, even when the Si film contacts with a surface of the electrode.
Patent
Semiconductor laser apparatus
Wada Masaru,Kunio Itoh +1 more
TL;DR: In this paper, a laser chip is directly disposed on a support member through a mounting arrangement and the laser chip, and peripheral parts thereof are integrally sealed within a transparent plastic resin.
Patent
Reflector for semiconductor laser end-face and method of manufacturing the same
TL;DR: In this paper, a dielectric reflector of deposited films is formed on an end-face of a ZnSe semiconductor laser device, and the deposited films are formed by three repetitions of alternately depositing an SiO2 film and a TiO 2 film which each has an optical thickness of a quarter of the oscillating wavelength of the laser device.
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Patent
Multi-layer reflector for electroluminescent device
TL;DR: A reflector of optical radiation is on at least one radiation emitting facet of an electroluminescent device as mentioned in this paper, which includes a plurality of contiguous layers of alternating composition, each of which is of silicon and a material selected from the group consisting of aluminum oxide, magnesium fluoride and silicon dioxide.
Journal ArticleDOI
A new dielectric facet reflector for semiconductor lasers
TL;DR: In this paper, a dielectric reflector designed for injection laser facets which consists of alternating quarter-wavelength layers of Al2O3 and Si is described. But the reflectivity for six layers can be made ≳0.98 over a wavelength range from ∼0.7 to ≳2 μm.
Patent
Passivation and reflector structure for electroluminescent devices
TL;DR: A passivation layer of perylene and its incorporation in three layer reflector structure deposited on the light emitting surface of a semiconductor electroluminescent device is disclosed in this paper.
Patent
Semiconductor laser device with facet passivation film
Jun-Ichi Umeda,Toshikazu Shimada,Michiharu Nakamura,Yoshifumi Katayama,Takashi Kajimura,Yamashita Shigeo +5 more
TL;DR: In this article, a semiconductor laser element is disclosed which includes a film of an amorphous material deposited on at least an optical output facet of the laser element and contains silicon and hydrogen as the indispensable components.
Patent
Antireflection coatings for injection lasers
TL;DR: In this article, Antireflection dielectric coatings on the output face of an injection laser provide a negative electric vector amplitude reflection coefficient which increases the obtainable power output.