An integrated device includes a micro-lens and an opto-electronic device can be formed on a single substrate. The opto-electronic device may be one or more photodetectors and the micro-lens may be shaped to allow partial absorption of light incident to the micro-lens by the photodetectors. The integrated...http://www.google.es/patents/US6493475?utm_source=gb-gplus-sharePatente US6493475 - Monolithic integration of signal-monitoring scheme in an optical switch
Monolithic integration of signal-monitoring scheme in an optical switch
