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Photodiode Array for Monitoring Individual Lasers in a Laser Array

IP.com Disclosure Number: IPCOM000044584D
Original Publication Date: 1984-Dec-01
Included in the Prior Art Database: 2005-Feb-06

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Mooney, PM [+details]


An array of GaAs laser chips may be mounted on a silicon submount in which photodiodes have been fabricated so that each laser may be monitored individually. In laser array applications it is often necessary to control the output of each laser independently. While it may be possible to do this by controlling each laser sequentially using a large area photodetector, if this is not feasible, individual photodetectors must be used to monitor each laser separately. It is customary to package a discrete photodetector with a semiconductor laser for the purpose of monitoring the light output from a rear facet of the laser. It is also often the case that the laser diode is mounted on a silicon submount.