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US 9,432,139 B2Granted
Optical module having composite prism to multiplex optical beams
AssigneeSumitomo Electric Device Innovations, Inc.
InventorTakeshi Okada
Life of this patent
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Abstract
An optical module that installs a plurality of laser diodes (LDs) and a composite prism to condense optical beams emitted from the LDs is disclosed. The LDs are arranged on a line so as to level the optical beams within a plane. The composite prism includes input surfaces and output surfaces each corresponding to respective one of the input surfaces. The composite prism outputs optical beams whose intervals are narrowed compared with intervals of the optical beams entering therein.
Claims21
An optical module, comprising:
- a plurality of laser diodes (LD) configured to emit optical beams;
- a plurality of collimator lenses, each being optically coupled with respective one of the LDs and collimating respective one of the optical beams;
- a composite prism providing a plurality of input surfaces and a plurality of output surfaces, the input surfaces receiving optical beams output from respective collimator lenses, the output surfaces outputting respective optical beams;
- and
- a condenser lens having an optical axis, the condenser lens configured to focus the respective optical beams output from the output surfaces of the composite prism on an end of an external fiber,
- wherein the composite prism reduces intervals between optical beams entering therein to output the optical beams with reduced intervals,
- wherein each of the input surfaces of the composite prism is optically coupled with one of output surfaces specific to each of the input surfaces, and
- wherein each of the input surfaces and one of the output surfaces specific to each of the input surfaces extend in parallel but are inclined with respect to an optical axis of respective one of the optical beams entering each of the input surfaces.
5 more elements
An optical module comprising:
- a plurality of laser diodes (LD) configured to emit optical beams;
- a plurality of collimator lenses, each being optically coupled with respective one of the LDs and collimating respective one of the optical beams;
- a composite prism providing a plurality of input surfaces and a plurality of output surfaces, the input surfaces receiving optical beams output from respective collimator lenses, the output surfaces outputting respective optical beams;
- and
- a condenser lens having an optical axis, the condenser lens configured to focus the respective optical beams output from the output surfaces of the composite prism on an end of an external fiber, wherein the composite prism reduces intervals between optical beams entering therein to output the optical beams with reduced intervals,
- wherein the composite prism includes a first body and a second body,
- wherein the first body includes a parallelepiped block having two input surfaces forming an external corner and two output surfaces forming an external corner, and
- wherein the optical beams entering respective ones of the input surfaces of the first body output from respective ones of the output surfaces of the first body as crossing each other in the first body.
5 more elements
An optical module comprising:
- a plurality of laser diodes (LD) configured to emit optical beams;
- a plurality of collimator lenses, each being optically coupled with respective one of the LDs and collimating respective one of the optical beams;
- a composite prism providing a plurality of input surfaces and a plurality of output surfaces, the input surfaces receiving optical beams output from respective collimator lenses, the output surfaces outputting respective optical beams;
- a condenser lens having an optical axis, the condenser lens configured to focus the respective optical beams output from the output surfaces of the composite prism on an end of an external fiber, wherein the composite prism reduces intervals between optical beams entering therein to output the optical beams with reduced intervals;
- and
- a plurality of auxiliary lenses set between the LDs and the collimator lenses,
- wherein each of the auxiliary lenses concentrates optical beams emitted from respective one of the LDs and forms beam waist, and each of the collimator lenses collimates the beam waist formed by the respective one of the auxiliary lenses.
4 more elements
Dependencies are inferred from the claim text.