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US 7,352,782 B2Granted
Surface emitting semiconductor laser and communication system using the same
AssigneeFuji Xerox Co., Ltd.
InventorYasuaki Kuwata
Life of this patent
Estimating the term…
Abstract
A surface emitting semiconductor laser includes a laminate of semiconductor layers emitting multimode laser light, and a block member blocking light of a specific mode among the multimode laser light emitted from the laminate.
Claims4
A surface emitting semiconductor laser apparatus comprising:
- a surface emitting semiconductor laser capable of emitting multimode laser light;
- a package that houses the surface emitting semiconductor laser and has a transmission window via which the multimode laser light is emitted;
- and
- a block member that is provided in the transmission window and blocks light of a specific oscillation mode among the multimode laser light,
- wherein the block member has a diameter D1 defined as follows:
- D1=L1×2 tan(θn/2)
- where L1 is a distance from the surface emitting semiconductor laser to the block member, θn is a divergence angle of emitted light of the specific oscillation mode from an optical source of the surface emitting semiconductor laser in a far-field image of the multimode laser light.
4 more elements
A surface emitting semiconductor laser apparatus comprising:
- a surface emitting semiconductor laser capable of emitting multimode laser light;
- a package that houses the surface emitting semiconductor laser and has a transmission window via which the multimode laser light is emitted;
- and
- a block member that is provided in the transmission window and blocks light of a specific oscillation mode among the multimode laser light,
- wherein the block member is equipped with an antireflection film that prevents the multimode laser light from being reflected by the block member.
2 more elements
A surface emitting semiconductor laser apparatus comprising:
- a surface emitting semiconductor laser capable of emitting multimode laser light;
- a package that houses the surface emitting semiconductor laser and has a transmission window via which the multimode laser light is emitted;
- and
- a block member that is provided in the transmission window and blocks light of a specific oscillation mode among the multimode laser light,
- wherein the block member includes an absorption member that absorbs the light of the specific oscillation mode.
2 more elements
Dependencies are inferred from the claim text.