10.6 Micrometer PbSnTe Mosaic Development.
Abstract
Development of a technology to produce Pb sub 1-x Sn sub x Te, heterostructure mosaic detector arrays capable of gigahertz operation for the CO2 laser radar track and receive system is reported. The results include two main areas: (1) Technology developed to produce 4-element mosaics with a working mosaic delivered to Rome Air Development Center for use in the RADC/CORAL CO2 track and receive radar system. (2) Technology developed for a new device configuration - the inverted heterostructure photodiode that has reduced noise and dead space and is easily multiplexed. A heterostructure mosaic was delivered to RADC that prossessed the following properties as measured at the Science Center: 1) prediced frequency response of 1.4 GHz to 1.7 GHz; 2) average quantum efficiency 97% with + or- 2% variation and + or - 10% absolute accuracy; and 3) dark currents of 0.9 mA + or - 0.2 mA. Electrical crosstalk was lower than - 15 dB while the optical crosstalk was lower than -25dB. With the use of a 10 ohm input -50 ohm output amplifier having a 3 dB noise figure over its 2 KHz to 2 GHz bandwidth, the mosaic should achieve a minimum detectable power near 3 x 10 to the -20th power W/Hz.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1974
- Accession Number
- AD0919812
Entities
People
- A. Michael Andrews