Patent US5168499A successfully refreshed from Google Patents.
Patent US5418802A successfully refreshed from Google Patents.
US5418802A
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Frequency tunable waveguide extended cavity laser
Assignee: Eastman Kodak Co
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Filing: 1993-11-12
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Granted: 1995-05-23
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Expires: 2013-11-12
Abstract
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.
Inventors
- 👤 James M. Chwalek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:55
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/03; G02F1/035; H; H01; H01S; H01S3/00; H01S3/10; H01S3/106; H01S3/108; H01S3/109; H01S5/00; H01S5/10; H01S5/14; H01S5/141; G02F2201/00; G02F2201/30; G02F2201/307; H01S3/105; H01S3/1055; H01S5/005; H01S5/0092
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
119 words
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.
Claim 2
Dependent Claim
119 words
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.
Claim 3
Dependent Claim
20 words
The device of claim 1 wherein the front facet of said laser diode is coated with a partially reflective coating.
Claim 4
Dependent Claim
19 words
The device of claim 1 wherein the front facet of said laser diode is coated with an anti-reflective coating.
Claim 5
Dependent Claim
16 words
The device of claim 1 wherein said Bragg grating reflector is composed of said electro-optic material.
Claim 6
Dependent Claim
26 words
The device of claim 1 wherein said Bragg grating reflector is composed of an optically transparent inorganic material positioned on the surface of said channel waveguide.
Claim 7
Dependent Claim
26 words
The device of claim 1 wherein said Bragg grating reflector is composed of an optically transparent organic material positioned on the surface of said channel waveguide.
Claim 8
Dependent Claim
36 words
The device of claim 1 wherein said means for applying an adjustable electric field to said Bragg grating reflector comprises an adjustable voltage system and a pair of conducting electrodes which surround said Bragg grating reflector.
Claim 9
Dependent Claim
182 words
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; 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.
Claim 10
Dependent Claim
182 words
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; 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.
Claim 11
Dependent Claim
20 words
The device of claim 8 wherein the front facet of said laser diode is coated with a partially reflective coating.
Claim 12
Dependent Claim
19 words
The device of claim 8 wherein tile front facet of said laser diode is coated with an anti-reflective coating.
Claim 13
Dependent Claim
16 words
The device of claim 8 wherein said Bragg grating reflector is composed of said electro-optic material.
Claim 14
Dependent Claim
26 words
The device of claim 8 wherein said Bragg grating reflector is composed of an optically transparent inorganic material positioned on the surface of said channel waveguide.
Claim 15
Dependent Claim
26 words
The device of claim 8 wherein said Bragg grating reflector is composed of an optically transparent organic material positioned on the surface of said channel waveguide.
Claim 16
Dependent Claim
36 words
The device of claim 8 wherein said means for applying an adjustable electric field to said Bragg grating reflector comprises an adjustable voltage system and a pair of conducting electrodes which surround said Bragg grating reflector.
Claim 17
Dependent Claim
18 words
The device of claim 8 wherein said electro-optic material and said nonlinear optical material are the same material.
Claim 18
Dependent Claim
204 words
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; 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.
Claim 19
Dependent Claim
204 words
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; 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.
Claim 20
Dependent Claim
20 words
The device of claim 16 wherein the front facet of said laser diode is coated with a partially reflective coating.
Claim 21
Dependent Claim
19 words
The device of claim 16 wherein the front facet of said laser diode is coated with an anti-reflective coating.
Claim 22
Dependent Claim
16 words
The device of claim 16 wherein said Bragg grating reflector is composed of said electro-optic material.
Claim 23
Dependent Claim
26 words
The device of claim 16 wherein said Bragg grating reflector is composed of an optically transparent inorganic material positioned on the surface of said channel waveguide.
Claim 24
Dependent Claim
26 words
The device of claim 16 wherein said Bragg grating reflector is composed of an optically transparent organic material positioned on the surface of said channel waveguide.
Claim 25
Dependent Claim
36 words
The device of claim 16 wherein said means for applying an adjustable electric field to said Bragg grating reflector includes an adjustable voltage system and a pair of conducting electrodes which surround said Bragg grating reflector.
Claim 26
Dependent Claim
18 words
The device of claim 16 wherein said electro-optic material and said nonlinear optical material are the same material.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-05-22 | 1998-11-21 | 1999-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-05-22 | 2002-11-21 | 2003-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-05-22 | 2006-11-21 | 2007-05-23 | $7700.00 | Window Closed / Lapsed |