Optical interference signal extractor with device for reduced no

Details Optical interference signal extractor with device for reduced no Optical interference signal extractor with device for reduced no

1990-01-04

1992-05-05

Turner, Samuel A.

Electronic digital logic circuitry

Multifunctional or programmable

Array

356358, G01B 902

Patent

active

051102110

ABSTRACT:
In a device which extracts an optical interference signal for analyzing the spectrum of light to be measured, the light to be measured is incident to an optical interferometer capable of sweeping an optical path difference and interference light output therefrom is converted into an electric signal to obtain an optical inteference signal. On the other hand, the optical power of the light to be measured is extracted to create an optical power signal, which is provided to a divider, wherein the optical interference signal is divided by the optical power signal to obtain a noise-free optical interference signal.

REFERENCES:
patent: 4759628 (1988-07-01), Tatsuno et al.
Review of Scientific Instruments, vol. 59, No. 2, Feb. 1988, pp. 242-248, New York, U.S., F. Ozanam et al.: "Fourier transform electromodulated, infrared spectrometer for studies at the electrochemical interface".
IBM Technical Disclosure Bulletin, vol. 17, No. 7, Dec. 1974, pp. 1927-1928, New York, U.S.; F. Buckley, III: "Automatic gain control system".
J. E. E. Journal of Electronic Engineering, vol. 23, No. 236, Aug. 1986, pp. 58-60; N. Arakawa: "Optical spectrum analyer: New Techniques and new functions".
Applied Optics, vol. 13, No. 4, Apr. 1974, pp. 723-725; R. J. Douglas et al. "Simple double-beam modification for far infrared interferometers".

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