Enhanced signal coupling into periodically poled lithium niobate with microlens arrays.
- Resource Type
- Academic Journal
- Authors
- Brewer CD; christopher.brewer@wpafb.af.mil; Powers PE; Kirkpatrick SM; Watson EA
- Source
- Publisher: Optica Publishing Group Country of Publication: United States NLM ID: 0247660 Publication Model: Print Cited Medium: Print ISSN: 1559-128X (Print) Linking ISSN: 1559128X NLM ISO Abbreviation: Appl Opt Subsets: PubMed not MEDLINE
- Subject
- Language
- English
- ISSN
- 1559-128X
The return signal frequency of an eye-safe ladar system is upconverted from the infrared to the visible through sum-frequency generation by incorporation of periodically poled LiNbO3 into the receiver. A quantitative analysis of the angular acceptance and the quantum efficiency is then presented for a single macroscopic receiver optic and a multiaperture microlens array. Comparing both results, a 6x increase in the receiver field of regard and an 18% increase in beam coupling were realized for the microlens design over the macroscopic system.