20dBm linearly polarised tunable single-frequency diode-pumped Er : Yb laser at 1535nm using anisotropic absorptive intracavity etalon

A linearly polarised single-frequency diode-pumped Er:ro bulk laser with ou tput power in excess of 100mW has been demonstrated. The use of an anisotro pic absorptive intracavity etalon to achieve both single-frequency operatio n and linearly polarised output is investigated. Output power and tuning ch aracteristics as well as relative-intensity noise measurements are reported . A new active medium, based on a new glass host with reduced pump-induced birefringence, allowed for negligible performance degradation when using th e anisotropic etalon instead of a standard BK7 etalon. A broad tuning range and a relative-intensity-noise peak of about -90dB/Hz has been achieved.