Semiconductor laser device making use of photodiode chip

Details Semiconductor laser device making use of photodiode chip Semiconductor laser device making use of photodiode chip

1993-09-14

1996-07-30

Epps, Georgia Y.

Optical waveguides

With disengagable mechanical connector

Optical fiber to a nonfiber optical device connector

257184, 257196, 257201, 257459, 385 93, 372 43, 372 50, 372 36, G02B 636

Patent

active

055420184

ABSTRACT:
A semiconductor laser device in which a housing with an optical fiber inserted in is secured to a header with a semiconductor laser chip mounted on is integrated, the light emitting surface of the semiconductor laser chip and the end surface of the optical fiber are opposed to each other, and there is provided a photodiode chip for detecting the signal light emitted from the backside (rear end surface) of the light emitting surface of the semiconductor laser chip, in the top incidence type photodiode chip having a pn junction area of the structure as a photo-sensing region, the first region is surrounded by a second region of the second conductivity type formed at a portion of the semiconductor layer. The second region has the same or larger depth as or than that of the first region. Thus, even if a light is directed to the outside of the photo-sensing region, extra charges into the photo-sensing region is prevented.

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patent: 4996169 (1991-02-01), Lee
patent: 5144396 (1992-09-01), Sargood
IEE Proceedings Journal of Optoelectronics, vol. 137, Pt.J, No. 3, entitled "High Quantum Efficiency p.sup.+ /.pi.
.sup.-
.sup.+ silicon photodiode," by Yin et al, dated Jun. 1990.

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