US3792287A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-linear optical crystal and devices
Assignee: Rosemount Inc
•
Filing: 1971-09-17
•
Granted: 1974-02-12
•
Expires: 1991-09-17
Abstract
Abstract A compound of the formula Tl3AsSe3 is disclosed. It can be made into large, optically useful crystals which are birefringent and display nonlinear optical properties in the infrared. A harmonic generator, an optical parametric oscillator, and an optical frequency upconverter incorporating this crystal are also disclosed.
Inventors
- 👤 G Roland
- 👤 J Feichtner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:53
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/35; G02F1/355; G02F1/3551; C; C01; C01B; C01B19/00; C01B19/007; G02F1/39; H; H01; H01S; H01S3/00; H01S3/10; H01S3/106; H01S3/108; C01P; C01P2002/00; C01P2002/70; C01P2002/76; C01P2002/80; C01P2002/84
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
22 words
A crystal according to claim 1 which has two polished parallel faces the space in between which is composed of said crystal.
Claim 2
Dependent Claim
33 words
means for directing said two rays of light parallel to each other at a face of said crystal at the angle of the c-axis of said crystal at which said rays are phase-matched.
Claim 3
Dependent Claim
7 words
means for exciting said lasing material; and
Claim 4
Dependent Claim
10 words
means for generating a fundamental ray of coherent light; and
Claim 5
Dependent Claim
9 words
means for generating a fundamental ray of coherent light;
Claim 6
Dependent Claim
21 words
A crystal according to claim 2 wherein said polished parallel faces are at about 20* to about 60* to its c-axis.
Claim 7
Dependent Claim
16 words
means for directing said fundamental ray at one of said polished faces of said crystal; and
Claim 8
Dependent Claim
38 words
two parallel mirrors, m1 and m2, positioned at opposite ends of said lasing material, m1 being reflecting at the wavelength of said fundamental ray and m2 being at least partially reflecting at the wavelength of said fundamental ray.
Claim 9
Dependent Claim
49 words
means for directing said fundamental ray at one of said polished faces of said crystal at the angle to the c-axis of said crystal at which said ray and said harmonic are phase-matched, said fundamental ray and said harmonic having wavelengths between about 1.25 and about 17 Mu m.
Claim 10
Dependent Claim
78 words
two parallel opposing mirrors M1 and M2, the optical axis of which is parallel to said fundamental ray within said crystal, M1 positioned between said means for generating said fundamental ray and said crystal and being transparent to said fundamental ray and M2 being positioned at the opposite end of said crystal, one of said mirrors being reflecting at the wavelength of said signal ray and the other being partially reflecting at the wavelength of said signal ray.
Claim 11
Dependent Claim
4 words
A harmonic generator comprising
Claim 12
Dependent Claim
29 words
A harmonic generator according to claim 4 wherein the normals of both polished parallel faces of said crystal are at said phase-matched angle to the c-axis of said crystal.
Claim 13
Dependent Claim
33 words
A harmonic generator according to claim 4 wherein said fundamental ray of coherent light has a power density of at least about 10 watts/cm2 and is an ordinary ray relative to said crystal.
Claim 14
Dependent Claim
36 words
An optical parametric oscillator for generating a signal ray and an idler ray from a fundamental ray, where the wavelengths of all three rays are between about 1.25 Mu m and about 17 Mu m comprising:
Claim 15
Dependent Claim
23 words
An optical parametric oscillator according to claim 6 wherein said means for generating said fundamental ray of coherent light is a laser comprising:
Claim 16
Dependent Claim
33 words
An optical parametric oscillator according to claim 8 wherein m2 is partially reflecting at the wavelength of said fundamental ray and a portion of said fundamental ray passes through m2 to said crystal.
Claim 17
Dependent Claim
43 words
A parametric oscillator according to claim 8 wherein M1, said crystal, and M2 are positioned between said lasing material and m2, and m2 is reflecting at the wavelength of said fundamental ray and is partially reflecting at the wavelength of said signal ray.
Claim 18
Dependent Claim
24 words
An optical parametric oscillator according to claim 7 wherein a lens is provided which focuses said fundamental ray at the center of said crystal.
Claim 19
Dependent Claim
23 words
An optical parametric oscillator according to claim 7 wherein said other of said mirrors is about 95 percent reflecting at said signal frequency.
Claim 20
Dependent Claim
20 words
An optical parametric oscillator according to claim 7 wherein both mirrors are reflecting at the wavelength of said idler ray.
Claim 21
Dependent Claim
30 words
An optical parametric oscillator according to claim 7 wherein the normals of both polished parallel faces of said crystal are at the phase-matched angle to the c-axis of the crystal.
Claim 22
Dependent Claim
20 words
An optical parametric oscillator according to claim 7 wherein said fundamental ray is an extraordinary ray relative to said crystal.
Claim 23
Dependent Claim
19 words
An optical parametric oscillator according to claim 7 wherein M2 is reflecting at the wavelength of said fundamental ray.
Claim 24
Dependent Claim
25 words
An optical parametric oscillator according to claim 7 wherein said fundamental ray of coherent light has a power density of at least about 10 watts/cm2.
Claim 25
Dependent Claim
19 words
An optical parametric oscillator according to claim 7 wherein M1 is reflecting at the wavelength of said signal ray.
Claim 26
Dependent Claim
33 words
An optical parametric oscillator according to claim 7 wherein said mirrors M1 and M2 are confocal, have their focal points at the center of the crystal, and are located close to the crystal.
Claim 27
Dependent Claim
29 words
An optical parametric oscillator according to claim 19 wherein said mirrors M1 and M2 have a radius of curvature about 2 to 3 times the length of said crystal.
Claim 28
Dependent Claim
18 words
An optical parametric oscillator according to claim 10 wherein M2 and m2 are combined into a single mirror.
Claim 29
Dependent Claim
42 words
An optical frequency upconverter for combining two input rays of light, at least one of which is coherent, into a signal ray, the wavelengths of all three of said rays being between about 1.25 Mu m and about 17 Mu m comprising:
Claim 30
Dependent Claim
25 words
An optical frequency upconverter according to claim 22 wherein each input ray is polarized and has a power density of at least about 10 watts/cm2.
Claim 31
Dependent Claim
24 words
An optical frequency upconverter according to claim 22 wherein both polished parallel faces of said crystal are at about 90* to said phase-matched angle.
Claim 32
Dependent Claim
16 words
An optical frequency upconverter according to claim 22 wherein both of said input rays are coherent.
References Cited (Backward Citations)
US3033693A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |