A wide bandwidth detection and display system for use with TEA CO2 lasers

Abstract
A photoconductive detector based on intravalence band transitions in p−type germanium is described. The detector responsivity is sufficient to drive a travelling−wave oscilloscope (Tektronix 519) without amplification, and consequently has an over−all bandwidth sufficient to display 300−ps−duration pulses from a mode−locked TEA CO2 laser.