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US4464624A
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Broadband optical spectrum analyzer
Assignee: Federal Mogul World Wide LLC
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Filing: 1981-10-15
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Granted: 1984-08-07
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Expires: 2001-10-15
Abstract
Abstract A broadband optical spectrum analyzer analyzes RF frequencies by modulating a laser beam at its source with the RF frequencies. The modulated laser beam is collimated and directed to a reflection means where signal components of different frequencies are reflected at different angles. Rays of the same spectral range are collected and interpreted.
Inventors
- 👤 Johann M. Osterwalder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:14
CPC Classifications
G; G01; G01R; G01R23/00; G01R23/16; G01R23/17
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
123 words
A broadband optical spectrum analyzer for analyzing an RF signal, comprising: injection laser means for generating a laser signal including a laser cavity; means for modulating said laser signal by introducing the RF signal to be analyzed into said laser cavity; means for collimating said modulated laser signal; reflecting means for reflecting said collimated laser signal with said laser signal components being reflected at different angles depending upon frequency content; a photodiode array; a transforming lens for focusing the laser rays of the same spectral range from said laser signal to a single point on said photodiode array, each diode output corresponding to a particular spectrum component of the RF signal being analyzed; and parallel post processing means for analyzing the RF signal.
Claim 2
Dependent Claim
123 words
A broadband optical spectrum analyzer for analyzing an RF signal, comprising: injection laser means for generating a laser signal including a laser cavity; means for modulating said laser signal by introducing the RF signal to be analyzed into said laser cavity; means for collimating said modulated laser signal; reflecting means for reflecting said collimated laser signal with said laser signal components being reflected at different angles depending upon frequency content; a photodiode array; a transforming lens for focusing the laser rays of the same spectral range from said laser signal to a single point on said photodiode array, each diode output corresponding to a particular spectrum component of the RF signal being analyzed; and parallel post processing means for analyzing the RF signal.
Claim 3
Dependent Claim
17 words
A broadband optical spectrum analyzer according to claim 1 wherein the laser signal is an infrared beam.
Claim 4
Independent Claim
99 words
The method of analyzing the spectrum of a broadband RF signal with a bandwidth varying from d.c. to beyond ten gigahertz, comprising the steps of: generating a laser beam in a cavity injection type generating device; introducing an RF signal to be analyzed into the cavity of said laser beam generating device for modulating said laser beam; collimating said laser beam: reflecting the various frequency components of said modulated laser beam at different angles; receiving said frequency components and converting the rays of the same spectral range to a point; and sensing the position and intensity of said rays.
Claim 5
Independent Claim
99 words
The method of analyzing the spectrum of a broadband RF signal with a bandwidth varying from d.c. to beyond ten gigahertz, comprising the steps of: generating a laser beam in a cavity injection type generating device; introducing an RF signal to be analyzed into the cavity of said laser beam generating device for modulating said laser beam; collimating said laser beam: reflecting the various frequency components of said modulated laser beam at different angles; receiving said frequency components and converting the rays of the same spectral range to a point; and sensing the position and intensity of said rays.
Claim 6
Dependent Claim
20 words
The method of analyzing the spectrum of a broadband RF signal according to claim 3 using an infrared laser beam.
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) | 1987-08-07 | 1988-02-06 | 1988-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-07 | 1992-02-06 | 1992-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-07 | 1996-02-06 | 1996-08-07 | $7700.00 | Window Closed / Lapsed |