Ultra-low noise, highly stable single-mode operation, high power, bragg grating based semiconductor laser
AssigneeMorton Photonics
InventorPaul Morton
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Abstract
A laser including: a gain chip; an external cavity incorporating a Bragg grating; and a baseplate; wherein a first end of the gain chip has a high reflectivity facet forming a first end of the laser cavity; a second end of the gain chip has a low reflectivity facet; and a second part of the external cavity comprises a Bragg grating, supported by the baseplate, the temperature of the baseplate being maintained through a feedback loop; wherein the optical length of the external cavity is at least an order of magnitude greater than the optical length of the gain chip; wherein the Bragg grating is physically long and occupies a majority of the length of the external cavity and is apodized to control the sidemodes of the grating reflection.
Claims21
1-21. (canceled)
A laser comprising:
- a semiconductor gain chip to generate light;
- and
- a waveguide external cavity having a first end and a second end and including an integrated Bragg grating to reflect at least a portion of the light
- wherein a first end of the gain chip has a high reflectivity facet forming a first end of a laser cavity;
- a second end of the gain chip has a low reflectivity facet, allowing light generated from the gain chip to be coupled to the first end of the waveguide external cavity,
- wherein the physical length of the Bragg grating is greater than 20 mm and occupies at least 75% of the physical length of the waveguide external cavity.
Dependencies are inferred from the claim text.