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High Normal Dispersion and Large Mode Area Photonic Quasi-Crystal Fiber Stretcher

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2 Author(s)
Sivabalan, S. ; Sch. of Electr. Eng., VIT Univ., Vellore, India ; Raina, J.P.

We propose a fiber stretcher for stretching the high-energy ultrashort pulses which require high dispersion and large mode area to secure high stretching ratio and for ensuring distortionless pulses. In this line, we suggest a novel design of photonic quasi-crystal fiber (PQF) to achieve the desired high normal group velocity dispersion (GVD) of 1000 ps2/km at 1.06 μm and inner core effective mode area as 35 μm2 . These unique properties have been exploited to achieve a high stretching ratio (>; 105 ) as well as less nonlinearity, which, in turn, results in a distortionless fiber stretcher for an Yb-doped high-energy ultrafast fiber laser system based on chirped pulse amplification.

Published in:

Photonics Technology Letters, IEEE  (Volume:23 ,  Issue: 16 )