Methods for spectrally-selective laser circulation for cryogenic optical refrigeration
OwnerMansoor Sheik-Bahae, Alexander Robert Albrecht +2inventors
InventorsMansoor Sheik-Bahae, Alexander Robert Albrecht, Azzurra Volpi, Jackson Kock
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Abstract
A laser cooling system and a method of laser cooling are disclosed. The laser cooling system includes a multi-pass optical cavity; a first mirror positioned at a first end of the multi-pass optical cavity; and a second mirror positioned at a second end of the multi-pass optical cavity, wherein the first mirror or the second mirror comprises a spectrally selective coating to suppress amplified spontaneous emission (ASE) and parasitic lasing to avoid undesired heat generation in a material being cooled in the multi-pass optical cavity.
Claims21
A laser cooling system comprising:
- a multi-pass optical cavity;
- a first mirror positioned at a first end of the multi-pass optical cavity;
- and
- a second mirror positioned at a second end of the multi-pass optical cavity, wherein the first mirror or the second mirror comprises a spectrally selective coating to suppress amplified spontaneous emission (ASE) and parasitic lasing to avoid undesired heat generation in a material being cooled in the multi-pass optical cavity, and wherein the first mirror, the second mirror, or both the first mirror and the second mirror have low reflectivity for longer wavelengths of a fluorescence spectrum.
A laser cooling system comprising:
- a multi-pass optical cavity;
- a first mirror positioned at a first end of the multi-pass optical cavity;
- a second mirror positioned at a second end of the multi-pass optical cavity;
- a wavelength-selective element positioned in the multi-pass optical cavity, wherein the wavelength-selective element comprises a spectrally selective coating to suppress amplified spontaneous emission (ASE) and parasitic lasing to avoid undesired heat generation in a material being cooled in the multi-pass optical cavity.
A method for laser cooling, the method comprising:
- directing a pump laser beam into a multi-pass optical cavity, the multi-pass cavity comprising a first mirror positioned at a first end of the multi-pass optical cavity and a second mirror positioned at a second end of the multi-pass optical cavity, wherein the first mirror or the second mirror comprises a spectrally selective coating to suppress amplified spontaneous emission (ASE) and parasitic lasing to avoid undesired heat generation in a material being cooled in the multi-pass optical cavity and wherein the first mirror, the second mirror, or both the first mirror and the second mirror have low reflectivity for longer wavelengths of a fluorescence spectrum;
- and
- optically cooling the material by repeated passes of the pump laser beam.
A method of laser cooling, the method comprising:
- directing a pump laser beam to a multi-pass optical cavity, wherein the multi-pass optical cavity comprises a first mirror positioned at a first end of the multi-pass optical cavity, a second mirror positioned at a second end of the multi-pass optical cavity, and a wavelength-selective element positioned in the multi-pass optical cavity, wherein the wavelength-selective element comprises a spectrally selective coating to suppress amplified spontaneous emission (ASE) and parasitic lasing to avoid undesired heat generation in a material being cooled in the multi-pass optical cavity;
- and
- optically cooling the material by repeated passes of the pump laser beam.
Dependencies are inferred from the claim text.