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Optica Publishing Group
  • Conference on Lasers and Electro-Optics
  • OSA Technical Digest (Optica Publishing Group, 1996),
  • paper CFI4

Synchronization of two passively mode-locked Er:doped fiber lasers using an acousto-optic modulator and grating design

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Abstract

We synchronize two passively Modelocked Er:doped fiber lasers (EDFL) of pulse width 4.5 ps by using a novel acousto-optic modulator (AOM) and grating scheme. By measuring the cross-correlation of the two lasers, the inter-laser jitter is extracted to be 1.3 times the pulse width. The temporal locking of lasers is important for telecommunication networks, measurement systems, and spectroscopy. Synchronization of passively mode-locked lasers, an important source of ultrashort pulses, requires locking of the repetition rate and the phase by tuning the cavity length. Although piezo-electric transducers (PZT) have been used to adjust the cavity length,1,2 their mechanical nature limits both the speed and dynamic range. Our AOM-grating scheme gives an effective tuning range of 375 μm (30 times that of PZTs) and bandwidth of 10 kHz (10 times that of PZTs).

© 1996 Optical Society of America

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