Efficient angle tunable output from a monolithic serial KTA optical parametric oscillator
First Claim
1. An optical parametric oscillator comprising:
- a crystal adapted to receive pump energy at a first wavelength, convert said pump energy to energy at both a primary signal wavelength and a primary idler wavelength by means of a primary process, and convert said energy at a primary signal wavelength to energy at both a second signal wavelength and second idler wavelength by means of a cascaded secondary process; and
a mechanism disposed in functional alignment with said crystal for containing said energy at a primary signal wavelength and enhancing said secondary process thereby, said mechanism including first and second mirrors, both of said mirrors being highly reflective at said primary signal wavelength, and at least one of said mirrors being at least partially transmissive to energy at said second signal wavelength.
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Abstract
An arrangement (10) for efficiently shifting energy received at a first wavelength and outputting the shifted energy at a second wavelength. The arrangement (10) includes a laser (12) and an optical parametric oscillator (14) of unique design. The oscillator (14) is constructed with an energy shifting crystal (20) and first and second reflective elements (16) and (18) disposed on either side thereof. Light from the laser (12) at a fundamental frequency is shifted by the crystal and output at a second wavelength. The second wavelength is a secondary emission of energy induced by a primary emission generated by the first wavelength in the crystal. A novel feature of the invention is a coating applied on the reflective elements (16 and/or 18) for containing the primary emission and enhancing the secondary emission. This constrains the energy to be output by the arrangement (10) at the wavelength of the desired secondary emission.
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9 Claims
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1. An optical parametric oscillator comprising:
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a crystal adapted to receive pump energy at a first wavelength, convert said pump energy to energy at both a primary signal wavelength and a primary idler wavelength by means of a primary process, and convert said energy at a primary signal wavelength to energy at both a second signal wavelength and second idler wavelength by means of a cascaded secondary process; and
a mechanism disposed in functional alignment with said crystal for containing said energy at a primary signal wavelength and enhancing said secondary process thereby, said mechanism including first and second mirrors, both of said mirrors being highly reflective at said primary signal wavelength, and at least one of said mirrors being at least partially transmissive to energy at said second signal wavelength. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification