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Generation of ultrashort pulses from a neodymium glass laser system

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4 Author(s)
Yan, L. ; Dept. of Electr. Eng., Maryland Univ., College Park, MD, USA ; Ho, P.-T. ; Lee, Chi H. ; Burdge, G.L.

A neodymium glass laser system capable of generating high-energy, ultrashort pulses at a convenient repetition rate is described. The effect of nonlinear frequency pulling on active mode locking is discussed. By minimizing the nonlinear frequency pulling, it is possible to routinely generate stable ~10-ps pulses at a 100-MHz repetition rate from the actively mode-locked oscillator. The regenerator amplifier increases the oscillator pulse energy to over 30 μJ at a 370-Hz repetition rate. Using intracavity self-phase modulation, the regenerative amplifier also broadens the pulse bandwidth to ~35 Å. By subsequent pulse compression while maintaining high energy, it is possible to produce 0.55-ps pulses with >10 μJ. An optical fiber pulse compressor further shortens the pulses to 30 fs (30 nJ), the shortest pulses ever generated at 1.054 μm from a neodymium laser system

Published in:

Quantum Electronics, IEEE Journal of  (Volume:25 ,  Issue: 12 )