DBR laser with improved thermal tuning efficiency
AssigneeFinisar Corporation
InventorsYasuhiro Matsui, Kevin J. McCallion, Parviz Tayebati
Life of this patent
Estimating the term…
Abstract
A distributed Bragg reflector (DBR) includes a base substrate and a gain medium formed on the base substrate. A waveguide positioned above the base substrate in optical communication with the gain medium and defines a gap extending between the base substrate and the waveguide along a substantial portion of the length thereof. The waveguide may have a grating formed therein. A heating element is in thermal contact with the waveguide and electrically coupled to a controller configured to adjust optical properties of the waveguide by controlling power supplied to the heating element.
Claims17
A laser comprising:
- a base substrate;
- a gain medium deposited on the base substrate;
- a waveguide positioned above the base substrate in optical communication with the gain medium, the waveguide having a grating formed therein and defining a gap extending between the base substrate and the waveguide along an entire length of the grating;
- a heating element in thermal contact with the waveguide;
- and
- a controller electrically coupled to the heating element and configured to adjust optical properties of the waveguide by controlling power supplied to the heating element.
A laser comprising:
- a base substrate;
- a gain medium formed on the base substrate;
- a raised substrate having a first end and a second end and having a top surface, bottom surface, and lateral surfaces extending between the top and bottom surfaces, the first end located adjacent the gain medium, the lower surface and base substrate defining a gap along a majority of a distance between the first and second ends;
- lateral supports engaging the lateral surfaces and extending to the base substrate;
- a waveguide embedded in the raised substrate in optical communication with the gain medium, the waveguide having a reflector formed therein;
- a heating element in thermal contact with the waveguide;
- and
- a controller electrically coupled to the heating element and configured to adjust optical properties of the waveguide by controlling power supplied to the heating element.
Dependencies are inferred from the claim text.