CW Injection-locked Single Frequency Ti:Sapphire Laser

• Main Authors: Li-Yueh Cheng, 鄭麗月
• Other Authors: Yi-Wei Liu
• Format: Others
• Language: en_US
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/28541767624186551733

碩士 === 國立清華大學 === 物理學系 === 92 === A cw Ti:Sapphire laser wave injected with a single frequency diode laser is demonstrated. The injection-locked Ti:Sapphire laser has an advantage of a low threshold than conventional single-frequency Ti:Sapphire laser, because it eliminates the necessity of intracavity linewidth narrowing components. In comparison with MOPA, this method can provide higher intensity and better spatial mode quality. Injection-locking a high power laser with a low power diode laser reproduces the diode laser at high power with good fidelity in frequency. The frequency shift and broadening of the Ti:Sapphire laser is measured using the method of beat note with the master laser. The linewidth is estimated as less than 5 MHz, and no shift is observed. The wavelength tuning range is determined by the tuning range of the laser diode used to inject the Ti:Sapphire laser. Such a system can be a powerful tool for laser spectroscopy at a frequency region, where the high power single frequency diode laser is not available.