Abstract
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.