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US 2003/0142716 A1Published application
Etalon and external resonance type laser
AssigneeFujitsu Limited
InventorKazuaki Akimoto
Life of this patent
Estimating the term…
Abstract
An etalon includes an analyzer, a first λ/4 plate having an optical axis forming a 45 degree angle with respect to an optical axis of the analyzer and receiving a light transmitted via the analyzer, and a second λ/4 plate having an optical axis which is parallel to or 90 degrees to the optical axis of the, first λ/4 plate and receiving a light transmitted via the first λ/4 plate. A reflection may occur between the first and second λ/4 plates.
Claims10
An etalon comprising:
- an analyzer;
- a first λ/4 plate, having an optical axis forming a 45 degree angle with respect to an optical axis of the analyzer, and receiving a light transmitted via the analyzer;
- and
- a second λ/4 plate, having an optical axis which is parallel to or 90 degrees to the optical axis of the first λ/4 plate, and receiving a light transmitted via the first λ/4 plate, such that a reflection occurs between the first and second λ/4 plates.
1 more element
An etalon comprising:
- an analyzer;
- a first λ/4 plate, having an optical axis forming a 45 degree angle with respect to an optical axis of the analyzer, and receiving a light transmitted via the analyzer;
- and
- a second λ/4 plate, having an optical axis which is parallel to or 90 degrees to the optical axis of the first λ/4 plate, and receiving a light transmitted via the first λ/4 plate,
- said analyzer receiving as an incident light to the etalon a linearly polarized light parallel to the optical axis of the analyzer.
2 more elements
An etalon comprising:
- a polarization splitting layer or prism;
- a first λ/4 plate, having an optical axis forming a 45 degree angle with respect to an optical axis of the polarization splitting layer or prism, and receiving a light transmitted via the polarization splitting layer or prism;
- and
- a second λ/4 plate, having an optical axis which is parallel to or 90 degrees to the optical axis of the first λ/4 plate, and receiving a light transmitted via the first λ/4 plate, such that a reflection occurs between the first and second λ/4 plates.
1 more element
An etalon comprising:
- a polarization splitting layer or prism;
- a first λ/4 plate, having an optical axis forming a 45 degree angle with respect to an optical axis of the polarization splitting layer or prism, and receiving a light transmitted via the polarization splitting layer or prism;
- and
- a second λ/4 plate, having an optical axis which is parallel to or 90 degrees to the optical axis of the first λ/4 plate, and receiving a light transmitted via the first λ/4 plate,
- said polarization splitting layer or prism receiving as an incident light to the etalon a linearly polarized light parallel to the optical axis of the polarization splitting layer or prism.
2 more elements
An external resonance type laser comprising:
- a laser medium having first and second semi-transparent mirrors;
- and
- an etalon comprising:
- an element selected from a group consisting of an analyzer, a polarization splitting layer and a polarization splitting prism;
- a first λ/4 plate, having an optical axis forming a 45 degree angle with respect to an optical axis of the element, and receiving a light transmitted via the element;
- and
- a second λ/4 plate, having an optical axis which is parallel to or 90 degrees to the optical axis of the first λ/4 plate, and receiving a light transmitted via the first λ/4 plate, such that a reflection occurs between the first and second λ/4 plates,
- a light transmitted via the first semi-transparent mirror being incident to the etalon,
- a light output from a light incident side of the etalon being fed back to said laser medium,
- said laser medium outputting an output light of the external resonance type laser via the second semi-transparent mirror.
7 more elements
An external resonance type laser comprising:
- a laser medium having first and second semi-transparent mirrors;
- and
- an etalon comprising:
- an element selected from a group consisting of an analyzer, a polarization splitting layer and a polarization splitting prism;
- a first λ/4 plate, having an optical axis forming a 45 degree angle with respect to an optical axis of the element, and receiving a light transmitted via the element;
- and
- a second λ/4 plate, having an optical axis which is parallel to or 90 degrees to the optical axis of the first λ/4 plate, and receiving a light transmitted via the first λ/4 plate,
- said element receiving as an incident light to the etalon a linearly polarized light parallel to the optical axis of the element,
- a light transmitted via the first semi-transparent mirror being incident to the etalon,
- a light output from a light incident side of the etalon being fed back to said laser medium,
- said laser medium outputting an output light of the external resonance type laser via the second semi-transparent mirror.
8 more elements
Dependencies are inferred from the claim text.