Frequency tunable waveguide extended cavity laser
First Claim
1. A frequency tunable waveguide extended cavity laser producing radiation at a desired frequency comprising:
- a) a laser diode having a reflecting rear facet and a front facet for emitting radiation;
b) a channel waveguide for receiving radiation from said front facet of said laser diode, a portion of said channel waveguide having an electro-optical material in the waveguide channel that undergoes a refractive index change in response to an applied electric field;
c) a Bragg grating reflector formed relative to said channel waveguide portion having said electro-optical material; and
d) means for applying an adjustable electric field to said Bragg grating reflector to change the refractive index of said electro-optic material so as to be at a desired frequency.
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Accused Products
Abstract
A frequency tunable waveguide extended cavity laser formed with a laser diode, a channel waveguide comprising an electro-optic material, a frequency tunable Bragg grating reflector formed in or on the channel waveguide and a pair of conducting electrodes. The frequency of radiation produced by the frequency tunable waveguide extended cavity laser is adjusted so as to be at a desired frequency by applying a voltage to the conducting electrodes. The device further incorporates a waveguide nonlinear optical frequency converter to produce frequency convened radiation at a higher frequency. Feedback means are included for dynamically controlling the desired frequency so as to be at a frequency for optimum frequency conversion.
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Citations
23 Claims
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1. A frequency tunable waveguide extended cavity laser producing radiation at a desired frequency comprising:
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a) a laser diode having a reflecting rear facet and a front facet for emitting radiation; b) a channel waveguide for receiving radiation from said front facet of said laser diode, a portion of said channel waveguide having an electro-optical material in the waveguide channel that undergoes a refractive index change in response to an applied electric field; c) a Bragg grating reflector formed relative to said channel waveguide portion having said electro-optical material; and d) means for applying an adjustable electric field to said Bragg grating reflector to change the refractive index of said electro-optic material so as to be at a desired frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A frequency tunable waveguide extended cavity laser producing radiation at a desired frequency comprising:
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a) a laser diode having a reflecting rear facet and a front facet for emitting radiation; b) a channel waveguide for receiving radiation from said front facet of said laser diode, a portion of said channel waveguide having an electro-optical material in the waveguide channel that undergoes a refractive index change in response to an applied electric field; c) a Bragg grating reflector formed relative to said channel waveguide portion having said electro-optical material; d) means for applying an adjustable electric field to said Bragg grating reflector to change the refractive index of said electro-optic material so as to be at a desired frequency; e) a nonlinear optical frequency convening waveguide portion having a nonlinear optical material which converts the frequency of said desired frequency to a higher frequency; and f) detection means opto-electronically responsive to the frequency converted radiation for continuously measuring the frequency converted radiation power, and feedback means for dynamically controlling said desired frequency so as to be at a frequency for optimum frequency conversion. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A frequency tunable waveguide extended cavity laser producing radiation at a desired frequency comprising:
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a) a laser diode having a reflecting rear facet and a front facet for emitting radiation; b) a channel waveguide for receiving radiation from said front facet of said laser diode, a portion of said channel waveguide having an electro-optical material in the waveguide channel that undergoes a refractive index change in response to an applied electric field; c) a Bragg grating reflector formed relative to said channel waveguide portion having said electro-optical material; d) a nonlinear optical frequency converting waveguide portion having a nonlinear optical material which converts the frequency of said desired frequency to a higher frequency and for which said nonlinear optical frequency converting waveguide portion is located in between said laser diode and said Bragg grating reflector; e) means for applying an adjustable electric field to said Bragg grating reflector to change the refractive index of said electro-optic material so as to be at a desired frequency; and f) detection means opto-electronically responsive to the frequency converted radiation for continuously measuring the frequency converted radiation power, and feedback means for dynamically controlling said desired frequency so as to be at a frequency for optimum frequency conversion. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
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Specification