Optical transmission module and method for manufacturing optical transmission module
AssigneeRenesas Electronics Corporation
InventorsKazuhiro MITAMURA, Hideyuki YAMADA
Life of this patent
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Abstract
An optical transmission module includes a stem, a semiconductor laser element mounted over the stem, a cap fixed to the stem and hermetically sealing the semiconductor laser element, and an optical isolator arranged on an optical path of light emitted from the semiconductor laser element. The cap includes a tubular body, one end side of which is fixed to the stem, and a light transmitting section located on the optical path while closing an opening on the other end side of the body, and fixed to the body so as to keep hermeticity with the body. The optical isolator is arranged inside an area hermetically sealed by the cap.
Claims9
An optical transmission module, comprising:
- a stem;
- a semiconductor laser element mounted over the stem;
- a cap fixed to the stem and hermetically sealing the semiconductor laser element;
- and
- an optical isolator arranged on an optical path of light emitted from the semiconductor laser element,
- wherein the cap includes;
- a tubular body, one end side of which is fixed to the stem, and
- a light transmitting section located on the optical path while closing an opening on the other end side of the body, and fixed to the body so as to keep hermeticity with the body, and
- the optical isolator is arranged inside an area hermetically sealed by the cap.
A method for manufacturing an optical transmission module, comprising:
- mounting a semiconductor laser element over a stem;
- fixing a cap to the stem and hermetically sealing the semiconductor laser element;
- and
- arranging an optical isolator on an optical path of light emitted from the semiconductor laser element,
- wherein the cap includes a tubular body, and a light transmitting section which closes an opening on one end side of the body and is fixed to the body so as to keep hermeticity with the body,
- the other end side of the body is fixed to the stem in said fixing the cap, and
- the optical isolator is arranged inside an area hermetically sealed by the cap in said arranging the optical isolator.
Dependencies are inferred from the claim text.