Patent US3627896A successfully refreshed from Google Patents.
US4386428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tripled Nd:YAG Pumped Tm3+ laser oscillator
Assignee: Lockheed Martin Corp
•
Filing: 1980-10-14
•
Granted: 1983-05-31
•
Expires: 2000-10-14
Abstract
Abstract Multiple frequency, visible laser outputs are obtained from a 1064 nanometer input by tripling the output of an Nd:YAG laser and using the 355 nanometer radiation for downconversion by pumping a Tm:LiYF 4 crystal.
Inventors
- 👤 James W. Bauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:44
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/05; H01S3/08; H01S3/08004; H01S3/09; H01S3/091; H01S3/094; H01S3/094038; H01S3/14; H01S3/16; H01S3/1601; H01S3/1603; H01S3/1616; H01S3/163; H01S3/1645; H01S3/1653
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
41 words
A downconverter laser oscillator, comprising: a resonant cavity; means for extracting energy from said cavity; a Tm:LiYF 4 crystal disposed within said resonant cavity; and a tripled Nd:YAG laser for pumping said Tm:LiYF 4 crystal with coherent radiation at 355 nanometers.
Claim 2
Dependent Claim
41 words
A downconverter laser oscillator, comprising: a resonant cavity; means for extracting energy from said cavity; a Tm:LiYF 4 crystal disposed within said resonant cavity; and a tripled Nd:YAG laser for pumping said Tm:LiYF 4 crystal with coherent radiation at 355 nanometers.
Claim 3
Dependent Claim
44 words
The laser oscillator of claim 1, further including a prism disposed within said resonant cavity and wherein said resonant cavity includes a pair of mirrors one of which is position variable so as to receive a particular wavelength of refracted energy from said prism.
Claim 4
Dependent Claim
31 words
The laser oscillator of claim 1 wherein said resonant cavity includes mirrors which can be selected to emit radiation at 453 nm, 520 nm, 670 nm, 760 nm and 800 nm.
Claim 5
Independent Claim
58 words
A method of providing downconversion from a first laser emitting at 1064 nanometers, comprising the steps of: doubling the output of said first laser to provide 532 nanometer radiation; mixing the 1064 and 532 nanometer radiation to generate radiation at 355 nanometers; providing a Tm:LiYF 4 laser; and pumping said Tm:LiYF 4 laser with the 355 nanometer radiation.
Claim 6
Independent Claim
58 words
A method of providing downconversion from a first laser emitting at 1064 nanometers, comprising the steps of: doubling the output of said first laser to provide 532 nanometer radiation; mixing the 1064 and 532 nanometer radiation to generate radiation at 355 nanometers; providing a Tm:LiYF 4 laser; and pumping said Tm:LiYF 4 laser with the 355 nanometer radiation.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-05-30 | 1986-11-29 | 1987-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-30 | 1990-11-29 | 1991-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-30 | 1994-11-29 | 1995-05-31 | $7700.00 | Window Closed / Lapsed |