Optics: measuring and testing – Angle measuring or angular axial alignment – Alignment of axes nominally coaxial
Patent
1986-12-08
1988-03-01
LaRoche, Eugene R.
Optics: measuring and testing
Angle measuring or angular axial alignment
Alignment of axes nominally coaxial
356400, G01B 1126
Patent
active
047281871
ABSTRACT:
The invention provides a method and apparatus for aligning an optical fiber and a semiconductor laser. The positions of the laser and of the fiber are located with respect to a fixed reference system, which is an optical detector which identifies the transverse light emission of the laser. With the laser position, the fiber is advanced so that it "flies over" the laser: the fiber then modulates the light received by the detector of the reference system. The fiber is moved back by a known amount and is moved by scanning in the plane transversal to the emissive axis of the laser, until a second optical detector, placed at the other end of the fiber, receives a maximum of light transmitted by the fiber.
REFERENCES:
patent: 4474469 (1984-10-01), Abe
patent: 4664732 (1987-05-01), Campbell et al.
patent: 4673290 (1987-06-01), Johnson et al.
Patents Abstracts of Japan, vol. 9, No. 93 (P-351) [1816], 23 Apr. 1985 & JP A 59 219 707 (Fujikura Densen K.K.).
Patents Abstracts of Japan, vol. 8, No. 165 (P-291) [1602], 31 Jul. 1984 & JP A 59 61 809 (Fujitsu K.K.).
Xerox Disclosure Journal, vol. 4, No. 3, May/Jun. 1979, pp. 387-388; M. D. Bailey et al.
Chamfrault Thierry
Dubroeucq Georges
Georgeot Michel
Martin Frantz
"Thomson-CSF"
LaRoche Eugene R.
Mis David
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