Patent US4037263A successfully refreshed from Google Patents.
US4037263A
Expired / Lapsed
US
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Arrangement for the direct conversion of items of data stored in magnetic form into optical signals
Assignee: Siemens AG
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Filing: 1975-07-21
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Granted: 1977-07-19
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Expires: 1995-07-21
Abstract
Abstract Magnetically stored data, for example data stored on a magnetic tape is converted directly into optical signals by an arrangement which comprises a magneto-optical modulator and a wave guide laser. The wave guide laser has an index of refraction n 2 and is arranged on a transparent substrate which has an index of refraction n 3 by epitaxial growth. The magneto-optical modulator has an index of refraction n 1 and is applied as an epitaxial growth to the wave guide laser. The indices of refraction fulfill the condition that n 1 > n 2 > n 3 .
Inventors
- 👤 Peter Moeckel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:13
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/09; G02F1/095; H; H01; H01S; H01S3/00; H01S3/05; H01S3/06; H01S3/063; H01S3/0632; H01S3/0635; H01S3/09; H01S3/091; H01S3/0915; H01S3/0933; H01S3/10; H01S3/102; H01S3/106; H01S3/1066
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
82 words
An arrangement for directly converting magnetically stored data of a moving record adjacent thereto into optical signals, comprising: a wave guide laser having an index of refraction n 2 ; a transparent substrate having an index of refraction n 3 and carrying said wave guide laser thereon; and a magneto-optical modulator carried on said wave guide laser adjacent the moving record and having an index of refraction n 1 , the indices of refraction having the relationships n.sub.1 > n.sub.2 > n.sub.3.
Claim 2
Dependent Claim
82 words
An arrangement for directly converting magnetically stored data of a moving record adjacent thereto into optical signals, comprising: a wave guide laser having an index of refraction n 2 ; a transparent substrate having an index of refraction n 3 and carrying said wave guide laser thereon; and a magneto-optical modulator carried on said wave guide laser adjacent the moving record and having an index of refraction n 1 , the indices of refraction having the relationships n.sub.1 > n.sub.2 > n.sub.3.
Claim 3
Dependent Claim
31 words
An arrangement according to claim 1, wherein said wave guide laser is an epitaxial growth on said substrate and said magneto-optical modulator is an epitaxial growth on said wave guide laser.
Claim 4
Dependent Claim
29 words
An arrangement according to claim 1, wherein said substrate consists of sapphire, said wave guide laser consists of yttrium-aluminum-garnet doped with neodymium, and said magneto-optical modulator consists of yttrium-iron-garnet.
Claim 5
Dependent Claim
20 words
An arrangement according to claim 1, comprising pump lamps on the side of said substrate opposite said wave guide laser.
Claim 6
Dependent Claim
35 words
An arrangement according to claim 1, comprising luminescence diodes carried on said substrate on the side opposite said wave guide laser and matched in emission wavelength to the pump band of said wave guide laser.
Claim 7
Dependent Claim
42 words
An arrangement according to claim 1, comprising an intermediate layer carried on said magneto-optical modulator and having a thickness of a few wavelengths and an index of refraction which is less than the index of refraction n 1 of said magneto-optical modulator.
References Cited (Backward Citations)
US3947087A
Cited
US3868589A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-18 | 1981-01-17 | 1981-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-18 | 1985-01-17 | 1985-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-18 | 1989-01-17 | 1989-07-19 | $7700.00 | Window Closed / Lapsed |