Access Networks

Ramaswami, Rajiv; Sivarajan, Kumar N.

doi:10.1016/b978-155860655-5/50013-7

Optical Networks 2002

DOI: 10.1016/b978-155860655-5/50013-7

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Access Networks

Rajiv Ramaswami¹,

Kumar N. Sivarajan²

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2017

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“…However, some of the applications such as curved plasma channel, supercontinuum generation and filamentation 3 11 12 require Airy beams in femtosecond timescales along with high average powers. Furthermore, future applications in high speed telecommunication systems 13 , photonic switching 14 , and time-resolved spectroscopy 15 require femtosecond Airy beams at high repetition rate (RR). To address such requirement one can in principle generate Airy beam from synchronously pumped femtosecond OPOs.…”

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Multi-gigahertz, femtosecond Airy beam optical parametric oscillator pumped at 78 MHz

Aadhi

Sharma

Chaitanya

et al. 2017

Sci Rep

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We report a high power ultrafast Airy beam source producing femtosecond pulses at multi-gigahertz (GHz) repetition rate (RR). Based on intra-cavity cubic phase modulation of an optical parametric oscillator (OPO) designed in high harmonic cavity configuration synchronous to a femtosecond Yb-fiber laser operating at 78 MHz, we have produced ultrafast 2D Airy beam at multi-GHz repetition rate through the fractional increment in the cavity length. While small (<1 mm) crystals are used in femtosecond OPOs to take the advantage of broad phase-matching bandwidth, here, we have exploited the extended phase-matching bandwidth of a 50-mm long Magnesium-oxide doped periodically poled LiNbO3 (MgO:PPLN) crystal for efficient generation of ultrafast Airy beam and broadband mid-IR radiation. Pumping the MgO:PPLN crystal of grating period, Λ = 30 μm and crystal temperature, T = 100 °C using a 5-W femtosecond laser centred at 1064 nm, we have produced Airy beam radiation of 684 mW in ~639 fs (transform limited) pulses at 1525 nm at a RR of ~2.5 GHz. Additionally, the source produces broadband idler radiation with maximum power of 510 mW and 94 nm bandwidth at 3548 nm in Gaussian beam profile. Using an indirect method (change in cavity length) we estimate maximum RR of the Airy beam source to be ~100 GHz.

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confidence: 99%

Multi-gigahertz, femtosecond Airy beam optical parametric oscillator pumped at 78 MHz

Aadhi

Sharma

Chaitanya

et al. 2017

Sci Rep

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Access Networks

Cited by 1 publication

References 11 publications

Multi-gigahertz, femtosecond Airy beam optical parametric oscillator pumped at 78 MHz

Multi-gigahertz, femtosecond Airy beam optical parametric oscillator pumped at 78 MHz

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