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US 5,134,620 AGranted
Laser with longitudinal mode selection
AssigneeGeneral Instrument Corporation
InventorDavid R. Huber
Life of this patent
Estimating the term…
Abstract
A laser is fabricated from an optical transmission medium having a laser cavity with an rare earth (e.g. Erbium) doped portion. At least one longitudinal mode is suppressed using a plurality of series coupled Fabry-Perot cavities, an optical grating, or a combination thereof. Ring lasers and linear structures are disclosed.
Claims22
A laser for providing an optical carrier comprising:
- a laser cavity formed in a guided wave configuration from an optical material doped at least in part with a rare earth element;
- and
- means including an optical grating and a separate reflector at opposite ends of said laser cavity for suppressing at least one mode thereof.
A laser for providing an optical carrier comprising:
- a laser cavity formed in a guided wave configuration from an optical material doped at least in part with a rare-earth element;
- and
- means including a plurality of series coupled Fabry-Perot cavities operatively associated with said laser cavity for suppressing at least one mode of said laser cavity.
A laser for providing an optical carrier comprising:
- a laser cavity formed from an optical material doped at least in part with a rare-earth element;
- and
- an external grating coupled to a first end of said laser cavity a distance L from a reflector coupled to a second end of said cavity, wherein the dimensions of said grating and said distance L cooperate to suppress at least one mode of said laser.
Dependencies are inferred from the claim text.