Generation of Tunable Amplitude-Squeezed Light by Injection Locking of a Laser Diode

Tunable amplitude squeezing around the D₂ line of cesium has been experimentally accomplished at room temperature in a quantum-well laser diode with light injection from a single-mode distributed Bragg-Reflector laser diode. While the master laser frequency is tuned, amplitude squeezing of the output light from the slave laser can be maintained at about 0.9dB throughout a tunable range of ~1.7GHz around the cesium D₂ line.