Research on Dual-Frequency-Oscillation Fiber Ring Loser with SOA

研制了一种新型光纤环形激光器，该激光器采用半导体光放大器，适用于新型光纤传感器。该激光器包含一个SOA作为光增益介质，它还可以作为偏振器、光纤准直器和法拉第旋转器。在激光腔中引入双折射介质会导致反传播振荡之间的频率差与双折射成比例。当石英熔芯作为传感介质引入时，观察到与施加压力成比例的频差移位，这表明该激光器是一种有前途的频域光纤传感器。

A new type of a fiber ring laser with a SOA (semiconductor optical amplifier) has been developed which is applicable to a novel fiber sensor. The laser contains a SOA as the optical gain medium which also acts as polarizer, fiber collimators, and Faraday rotators. Introducing a birefringent medium in the laser cavity results in a frequency difference between the counter-propagating oscillations in proportion to the birefringence. When a fused quartz cell was introduced as a sensing medium, in proportion to applied pressure a shift in the frequency difference was observed, which suggests that this laser is a promising frequency-domain fiber sensor.