Coupled-Cavity Modelocking of Solid-State Lasers using Quantum Wells,
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 Ti:Sapphire and Nd:YLF 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 kW/cm2 and a peak intensity of > 20 MW/cm2 at 250 MHz repetition rate. The mode-locking disappears at lower excitation levels. Using the RPM Ti:Sapphire 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 Ti:Sapphire 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.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 22, 1992
- Accession Number
- ADP007872
Entities
People
- G. W. 't Hooft
- T. K. Woodward
- U. Keller
- W. H. Knox