Arrangement comprising a semiconductor laser diode

Details Arrangement comprising a semiconductor laser diode Arrangement comprising a semiconductor laser diode

H - Electricity

04

B

345/32, 345/62

H04B 10/155 (2006.01) H01S 5/14 (2006.01)

Patent

CA 1157930

PHN 9819 -6- ABSTRACT: An optical fibre is coupled to an end face of a semiconductor laser diode and the other end face is coupled to one end of a monomode optical waveguide. The other end of waveguide is terminated in a reflecting man- ner, e.g. by mirror, to reduce the coherence length of the laser. Thus so-called "speckle patterns" are only produced in the transmission fibre over a short distance from the laser and modal noise further on in the trans- mission fibre can be prevented by avoiding the use of non-ideal fibre couplings or other connections having a spatial filter effect within this short distance from the laser.

382925

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