|
Efficient phase noise suppression of an external-cavity diode-laser by optical filtering and resonant optical feedback Y. Zhang, S. Miyakawa, K. Kasai, Y. Okada-Shudo, M. Watanabe We experimentally demonstrated that the excess phase noise of an external cavity diode laser (ECDL) can be efficiently suppressed by optical filtering and resonant optical feedback techniques. A suppression of more than 40 dB phase noise was obtained for the first time using these methods. It made that the phase noise of the ECDL reached shot noise level from 15 MHz. This opens a new way to reduce the phase noise of diode lasers. doi:10.1007/s00340-012-4918-8 |