Patent US4835779A successfully refreshed from Google Patents.
Patent US5084840A successfully refreshed from Google Patents.
US5084840A
Expired / Lapsed
US
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Passive absorptive rensonator laser system and method
Assignee: International Business Machines Corp
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Filing: 1991-03-22
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Granted: 1992-01-28
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Expires: 2011-03-22
Abstract
Abstract Pump laser light is focused into a solid state laser material. A resonator is positioned around the laser material. The resonator is comprised of reflectors which have high reflectivity at both the pump light frequency and the solid state laser light frequency. The resonator is impedance matched to the pump laser. The pump light resonates inside the solid state laser material until practically all of it is absorbed.
Inventors
- 👤 William J. Kozlovsky
- 👤 William P. Risk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:40
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/09; H01S3/091; H01S3/094; H01S3/05; H01S3/06; H01S3/0627; H01S3/08; H01S3/081; H01S3/083; H01S3/094084
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
113 words
A laser data storage system comprising: a pump laser for generating pump light at a first frequency; a laser material in optical communication with a pump laser for receiving said pump light and for producing laser light at a second frequency; an optical resonator in which the laser material is located, the optical resonator having resonance at approximately said first frequency and approximately said second frequency; an optical recording medium; an optical transmission means for directing said second frequency light from the optical resonator to the optical recording medium; and optical reception means for receiving a reflected second frequency light beam from the optical recording medium and providing a data signal responsive thereto.
Claim 2
Dependent Claim
113 words
A laser data storage system comprising: a pump laser for generating pump light at a first frequency; a laser material in optical communication with a pump laser for receiving said pump light and for producing laser light at a second frequency; an optical resonator in which the laser material is located, the optical resonator having resonance at approximately said first frequency and approximately said second frequency; an optical recording medium; an optical transmission means for directing said second frequency light from the optical resonator to the optical recording medium; and optical reception means for receiving a reflected second frequency light beam from the optical recording medium and providing a data signal responsive thereto.
Claim 3
Dependent Claim
25 words
The system of claim 1, wherein the optical resonator comprises a pair of mirrors which are reflective of light at the first and second frequencies.
Claim 4
Dependent Claim
51 words
The system of claim 2, wherein the reflectivity of a first mirror at the first frequency equals approximately (1-e -2 αL)*(R2), where α is the absorption coefficient of the laser material, L is the distance between the mirrors and R2 is the reflectivity of the second mirror at the first frequency.
Claim 5
Dependent Claim
11 words
The system of claim 1, wherein the laser material is Nd:YAG.
Claim 6
Dependent Claim
18 words
The system of claim 1, wherein the optical resonator comprises a plurality of mirrors made of dielectric coatings.
Claim 7
Dependent Claim
16 words
The system of claim 1, wherein the resonator is a ring resonator having three reflective surfaces.
Claim 8
Dependent Claim
72 words
The system of claim 6, wherein the reflectivity of a first mirror has a reflectivity at the first frequency equal to approximately (1-e -2 αL)*(R2)*(R3) where α is the absorption coefficient of the laser material, L is the length of a beam path around the ring resonator, R2 is the reflectivity of the second mirror at the first frequency, and R3 is the reflectivity of the third mirror at the first frequency.
Claim 9
Independent Claim
81 words
A method for a laser data storage system comprising: coupling a pump laser light into a laser material; resonating said pump laser light inside said laser material until all of said pump laser light has been absorbed; producing a laser light inside said laser material; resonating said laser light inside said laser material; directing said laser light to an optical data storage medium; and receiving a reflected light from said optical data storage medium and outputting a data signal responsive thereto.
Claim 10
Independent Claim
81 words
A method for a laser data storage system comprising: coupling a pump laser light into a laser material; resonating said pump laser light inside said laser material until all of said pump laser light has been absorbed; producing a laser light inside said laser material; resonating said laser light inside said laser material; directing said laser light to an optical data storage medium; and receiving a reflected light from said optical data storage medium and outputting a data signal responsive thereto.
References Cited (Backward Citations)
No citation records indexed.
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