Coherent light generators – Particular component circuitry – Optical pumping
Patent
1990-06-15
1991-11-12
Hille, Rolf
Coherent light generators
Particular component circuitry
Optical pumping
357 79, 357 80, 372 43, 372 38, 385 92, H01L 2302, H01L 2312
Patent
active
050652265
ABSTRACT:
A laser diode module includes a rectangular box-shaped metal casing having a bottom (B), an even number of guide pins (1-14) being led through the bottom (B) in a standardized DIL order. In addition to the laser diode itself (LD) the laser diode module further includes a metal base carrier (BC) on which the laser diode (LD), a photo diode (PD) and a support (S) for the glass fiber (F) are installed. The laser diode module further includes a guide pin (9) which is inserted in the bottom (B) by means of a feedthrough insulator for electrically connecting the laser diode module to an external transmission line (MT). In order to achieve a proper matching of the laser diode module and the characteristic impedance of the external transmission line (MT), so that reflection phenomena are avoided and the laser diode module is made suitable for use in systems with considerably higher bit rates than 1 Gbit/s, the aforesaid guide pin (9) forms the inner guide of a coaxial transmission line situated inside the casing, of which transmission line the outer guide (CBL) is electrically conductively connected to the casing, whereas in the connecting line between the inner guide (9) and the laser diode (LD) a resistor (CS) is inserted having a value such that the sum of the resistances of this resistor (CS) and the laser diode (LD) is substantially equal to the characteristic impedance of the coaxial transmission line (9, CBL).
REFERENCES:
patent: 4309717 (1982-01-01), Cardinal
patent: 4761788 (1988-08-01), Dietrich et al.
patent: 4803689 (1989-02-01), Shibanuma
patent: 4834491 (1989-05-01), Aoki et al.
patent: 4873566 (1989-10-01), Hokanson et al.
"Dual-In-Line Laser Diode Module for Fiber-Optic Transmission Up to 4 Gbit/s", Journal of Lightwave Technology, vol. LT-5, No. 10, Oct. 87, pp. 1403-1411.
Kluitmans Johannes T. M.
Kock Hendrikus G.
Tjassens Hindrik
Biren Steven R.
Hille Rolf
Ostrowski D.
U.S. Philips Corp.
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