Compact Bragg Grating Stabilized Ridge Waveguide Laser Module With a Power of 380 mW at 780 nm

A single ridge waveguide laser wavelength stabilized by a compact external Bragg grating cavity with an output power as much as 380 mW and a beam quality factor M² of 1.3 is presented. A characterization concerning tunability by current, short-term optical linewidth, and intensity fluctuations is performed. The device exhibits a wavelength tuning factor at 780 nm of 0.5 pm/mA, a short-term optical linewidth of 18 kHz, and a low-frequency relative intensity noise of -136 dB/Hz. These characteristics allow a high resolution absorption spectroscopy of the D2 line of rubidium.