A VCSEL (113) having first and second stacks of DBRs (120, 116) and an active region sandwiched therebetween (118) is formed. A PIN photo-detector is integrated onto the VCSEL by positioning it on the second stack in the light path. The PIN photo detector includes a first doped...http://www.google.com.au/patents/US5742630?utm_source=gb-gplus-sharePatent US5742630 - VCSEL with integrated pin diode
