fs Fiber Oscillator 

The Pulsed Fiber Oscillator is a passively mode-locked laser based on Yb doped single mode fiber.  It delivers fs optical pulses with 10-100 MHz pulse repetition rate.  The polarized output beam of the fiber oscillator is either free space with M^2=1 or delivered in a single mode, polarization maintaining fiber.  The very compact laser oscillator is mechanically and optically stable and maintenance free.  The laser can work in a wide external temperature range and requires itself no temperature stabilization. 

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