Accession Number:

ADP007872

Title:

Coupled-Cavity Modelocking of Solid-State Lasers using Quantum Wells,

Descriptive Note:

Corporate Author:

AT AND T BELL LABS HOLMDEL NJ

Report Date:

1992-05-22

Pagination or Media Count:

4.0

Abstract:

The ultrafast physics of MQW samples have been studied extensively. We used this to passively mode-lock solid-state lasers with small gain cross section such as TiSapphire and NdYLF lasers shows the laser cavity design which is called coupled cavity resonant passive mode-locking RPM - resonant because of the near-resonant nonlinearity in the coupled cavity. The excitation level of the MQW reflector is high with an average intensity of 20 kWcm2 and a peak intensity of 20 MWcm2 at 250 MHz repetition rate. The mode-locking disappears at lower excitation levels. Using the RPM TiSapphire laser with its picosecond tunable pulses, we performed some pump-probe measurements on a separate piece of the same p-i-n MQW reflective modulator structure which mode-locks the TiSapphire laser. We measure a fast reflectivity modulation with a time constant determined by the pump and probe pulse width superimposed on a long time transient due to carrier recombination, heating and screening of the built-in field.

Subject Categories:

  • Lasers and Masers

Distribution Statement:

APPROVED FOR PUBLIC RELEASE