Supercontinuum generation up to 2.5 μm in photonic crystal fiber made of lead-bismuth-galate glass

Abstract

In this paper we report on successful supercontinuum generation extending from the near to the mid-infrared region in the range 700-2500 nm in a micro-structured fiber made of lead-bismuth-galate glass and pumped in the femtosecond regime with a wavelength of 1540 nm. The flatness of 5 dB is observed in most of the registered spectrum 1000 -2500 nm. The improved spectral and thermo-physical properties of this custom made lead-bismuth-galate glass against tellurite and commercially available heavy oxide SF-57 glasses are presented.

Three octave spanning supercontinuum by red-shifted dispersive wave in photonic crystal fibers

“…Miret et al [9] have reported 3 dB flat SC spectra spanning over ~1500 nm by using femtosecond pulse in a 15 cm PCF which exhibits normal dispersion. Buczynski et al [11] have also reported about 1500 nm wide SC spectra in lead-bismuth-galate glass PCF by pumping femtosecond pulses at operating wavelength 1540 nm.Tiwari et al [8] generated SC spectra from 1000 nm to 3200 nm by using 50 fs pump pulse of peak power 2 kW in a 15 cm long PCF. Along this direction, we focus our attention to achieve broadband SC generation at low input power.…”

“…For example, PCFs made of fluoride glass, bismuth oxide, lead silicate, tellurite and chalcogenide etc., exhibit large effective nonlinearity which is suitable for devices that rely on optical nonlinearity. Particular interest has been shown to lead silicate glass with nonlinear coefficient which is 20 times larger than that of silica glass and has good thermal and crystallization stability [11,12]. Lead silicate glass fibers exhibit attenuation ~1-3 dB/m at the operating wavelength 1.55…”

“…First, to design a SF57 glass PCF which exhibits large nonlinearity and low dispersion and then we use this fiber to achieve broadband SC spectra employing pump pulses with low peak power.The proposed fiber can be fabricated without much difficulties since several authors have demonstrated the fabrication of PCFs with soft glass. For example, Leong et al [10] have fabricated a soft glass PCF with core diameter 0.95 μ , Xing-Ping et al [7] have studied SF57 PCF with small air hole of diameter 0.5 μ which was fabricated by Institute of Photonics and Advance Sensing at University of Adelaide, Australia.Buczynski et al [11] have also demonstrated the fabrication of lead silicate PCF with core diameter 3.36 μ by using extrusion technique [47].…”

Dispersion management in soft glass all-solid photonic crystal fibres

“…Heavy metal oxide glasses such as SF6 and SF57 offer a large Raman shift and high nonlinearity [5,6]. Highly nonlinear PCFs made of such glasses have been used successfully for broadband supercontinuum ge− neration with a low intensity input pulses [7][8][9].…”

Ultra-Wideband Multiwavelength Light Source Utilizing Rare Earth Doped Femtosecond Fiber Oscillator

“…It has been shown in many earlier works that slicing of a broadband continuum spectra is capable of generating a multiwavelength laser comb with both spacing tunability and a very wide spectral range (Nan et al, 2004). The supercontinuum light can be produced from a pulsed laser by using the interaction of multiple nonlinear effects such as self-phase modulation (SPM), four-wave mixing (FWM) and stimulated Raman scattering (SRS) in a highly nonlinear optical fiber (Buczynski et al, 2009(Buczynski et al, , 2010Kurkov et al, 2011;Lehtonen et al, 2003;Chen et al, 2011;Gu et al, 2010;Akozbek et al, 2006). Spectral slicing allows the channel spacing to be adjusted by changing the length of polarization maintaining fiber (PMF) used in the loop mirror (Ahmad et al, 2009).…”