Some n-p (Hg,Cd)Te photodiodes for 8-14 micrometer heterodyne applications
Abstract
The results describing the dc and CO2 laser heterodyne characteristics of a three element photodiode array and single element and four element photodiode arrays are presented. The measured data shows that the n(+)-p configuration is capable of achieving bandwidths of 475 to 725 MHz and noise equivalent powers of 3.2 x 10 to the minus 20th power W/Hz at 77 K and 1.0 x 10 to the minus 19th power W/Hz at 145 K. The n(+)-n(-)-p photodiodes exhibited wide bandwidths (approximately 2.0 GHz) and fairly good effective heterodyne quantum efficiencies (approximately 13-30 percent at 2.0 GHz). Noise equivalent powers ranging from 1.44 x 10 to the minus 19th power W/Hz to 6.23 x 10 to the minus 20th power W/Hz were measured at 2.0 GHz.
- Publication:
-
Heterodyne Systems and Technolology
- Pub Date:
- August 1980
- Bibcode:
- 1980hst..rept..263S
- Keywords:
-
- Cadmium;
- Mercury (Metal);
- Optical Heterodyning;
- Photodiodes;
- Tellurium;
- Astronomy;
- Carbon Dioxide;
- Semiconductor Devices;
- Signal To Noise Ratios;
- Lasers and Masers