Method and apparatus of measuring frequency response in an optic

Details Method and apparatus of measuring frequency response in an optic Method and apparatus of measuring frequency response in an optic

1987-01-08

1988-08-23

Willis, Davis L.

Optics: measuring and testing

By particle light scattering

With photocell detection

G01B 902

Patent

active

047657383

ABSTRACT:
In method and apparatus of measuring frequency response in an optical receiving system, a laser light source produces a frequency-modulated laser light which is divided into the first and second lights. The first light is delayed through a longer optical path than that of the second light by a predetermined time, and thereafter the delayed first light and the second light or the original laser light are combined to produce combined light. The frequency response is measured in accordance with output power of beat signal converted from the combined light in regard to frequency of the beat signal.

REFERENCES:
Kawanishi et al, "Measurement of High Frequency Response of Long Wavelength Optical Detector . . . ", National Conf. Record, 1985, Semiconductor Devices and Materials, Inst. of Electronics and Communication Engineers of Japan, Nov. 1985, pp. 1-191.
Kobayashi et al, "Direct Frequency Modulation in AlGaAs Semiconductor Lasers", IEEE Journal of Quantum Electronics, vol. QE-18, No. 14, Apr. 1982, pp. 582, 595.
Kawasaki et al, "Biconical-Taper Single-Mode Fiber Coupler", Optics Letters, vol. 6, No. 7, Jul. 1981, pp. 327-328.
Fujita et al, "Single-Mode Fiber Coupler for Optical Heterodyne Detection", National Conf. Record, 1984, Inst. of Electronics and Communication Engineers of Japan, Mar. 1984, p. 1059.

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