OPTICAL FREQUENCY MIXER AND METHOD FOR THE SAME
First Claim
1. An optical frequency mixer, comprising:
- a resonant cavity including a first reflective surface, a second reflective surface and an output coupler;
a pumping unit configured to emit a pumping wave to the laser gain medium to generate a resonating wave in the resonant cavity;
a nonlinear crystal positioned on an optical path of the resonating wave in the resonant cavity, wherein the nonlinear crystal includes a plurality of domains having alternating polarity and the widths of the domains are the same along a propagation of the resonating wave; and
an input interface configured to emit a mixing wave into the resonant cavity.
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Accused Products
Abstract
An optical frequency mixer according to one embodiment of the present invention comprises a V-shaped resonant cavity including a first reflective surface, a second reflective surface and an output coupler, a pumping unit configured to emit a pumping wave to the laser gain medium to generate a resonating wave in the resonant cavity, a nonlinear crystal positioned on an optical path of the resonating wave in the resonant cavity, and an input interface configured to emit a mixing wave into the resonant cavity. Preferably, the output coupler can be a plano-concave lens having a concave surface configured to reflect the resonating wave and to focus the resonating wave such that the spot size of the resonating wave is matched the spot size of the pumping wave. Particularly, the nonlinear crystal is positioned between the output coupler and the input interface.
5 Citations
28 Claims
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1. An optical frequency mixer, comprising:
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a resonant cavity including a first reflective surface, a second reflective surface and an output coupler; a pumping unit configured to emit a pumping wave to the laser gain medium to generate a resonating wave in the resonant cavity; a nonlinear crystal positioned on an optical path of the resonating wave in the resonant cavity, wherein the nonlinear crystal includes a plurality of domains having alternating polarity and the widths of the domains are the same along a propagation of the resonating wave; and an input interface configured to emit a mixing wave into the resonant cavity. - View Dependent Claims (2, 3, 4, 5, 6, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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7-9. -9. (canceled)
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21. A method for frequency mixing, comprising the steps of:
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generating a resonating wave in a resonant cavity having a nonlinear crystal; and emitting a mixing wave into the resonating cavity such that the resonating wave interacts with the mixing wave in the nonlinear crystal to generate an output wave having a wavelength different from those of the resonating wave and the mixing wave, wherein the resonating wave interacts with the mixing wave in the nonlinear crystal to generate the output wave through a nonlinear frequency mixing process selected from the group consisting of sum frequency generation process, difference frequency generation process, second harmonic generation process and combinations thereof. - View Dependent Claims (22, 23, 24, 26)
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25. (canceled)
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27. An optical frequency mixer, comprising:
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a resonant cavity including a first reflective surface, a second reflective surface and an output coupler; a pumping unit configured to emit a pumping wave to the laser gain medium to generate a resonating wave in the resonant cavity; a nonlinear crystal positioned on an optical path of the resonating wave in the resonant cavity, wherein the spot size of the resonating wave is matched with the spot size of the pumping wave and the widths of the domains vary along a propagation direction of the resonating wave; and an input interface configured to emit a mixing wave into the resonant cavity.
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28. An optical frequency mixer, comprising:
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a resonant cavity including a first reflective surface, a second reflective surface and an output coupler; a pumping unit configured to emit a pumping wave to the laser gain medium to generate a resonating wave in the resonant cavity; a nonlinear crystal positioned on an optical path of the resonating wave in the resonant cavity, wherein the nonlinear crystal includes a plurality of domains having alternating polarity and the widths of the domains vary along a propagation direction of the resonating wave; and an input interface configured to emit a mixing wave into the resonant cavity.
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Specification