Propagation of femtosecond pulses in large-mode-area, higher-order-mode fiber

We demonstrate propagation of 14 nJ femtosecond pulses through a large-mode-area, higher-order-mode (HOM) fiber with an effective area of 2100 microm2. The pulses propagate stably in the LP07 mode of the fiber through lengths as long as 12 m. The strongly chirped pulses exiting the amplifier fiber a...

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Bibliographic Details
Published in:Optics letters 2006-11, Vol.31 (21), p.3191-3193
Main Authors: NICHOLSON, J. W, RAMACHANDRAN, S, GHALMI, S, YAN, M. F, WISK, P, MONBERG, E, DIMARCELLO, F. V
Format: Article
Language:English
Subjects:
Exact sciences and technology
Fiber lasers
Fundamental areas of phenomenology (including applications)
Lasers
Nonlinear optics
Optics
Physics
Ultrafast processes
optical pulse generation and pulse compression
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Summary:We demonstrate propagation of 14 nJ femtosecond pulses through a large-mode-area, higher-order-mode (HOM) fiber with an effective area of 2100 microm2. The pulses propagate stably in the LP07 mode of the fiber through lengths as long as 12 m. The strongly chirped pulses exiting the amplifier fiber are dechirped by the high-order-mode fiber, resulting in pulses with a peak power of 61 kW after propagation in 5 m of the positive-dispersion fiber. A small amount of self-phase modulation is observed in the compressed pulses and is described well by a nonlinear Schrödinger equation model that takes into account the measured effective area and dispersion of the HOM fiber.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.31.003191