Broadband infrared generation in liquid-bromine-core optical fibers

Abstract

A new Raman-gain medium suitable for use throughout the infrared spectral region is described. Hollow silica fibers with liquid-bromine cores are shown to have very large Raman-gain coefficients (gamma=1.7x10(-8)cm/W at 1.1 microm with a Raman shift of 312 cm(-1)). The liquid-bromine core, being a homonuclear diatomic material, has no first-order infrared absorption, and transparency between 1 and 16 microm has been verified. Broadband infrared radiationbetween 1.1 and 4 microm was generated by stimulated Raman scattering in bromine-core fibers pumped with 1.06- and 2.11-microm radiation.

Hybrid photonic-crystal fiber

“…The same group subsequently published several papers with similar pulse durations, but increasing peak power, and over 100 W average power (Emaury et al, 2013(Emaury et al, , 2014. demonstrated compression, at 800 nm, from ∼100 to 10 fs at ∼10 μJ-the shortest pulses and highest peak See, e.g., Brabec and Krausz (2000) and Krausz and Ivanov (2009). power (∼1 GW) so far achieved using SPM-mirror compression.…”

“…The main reason of using liquids for the investigation of nonlinear effects was that the Kerr nonlinearity can be several times higher than silica (see Table I). Until a few years ago, the experiments with liquids were mainly performed in liquid cells or capillaries of a few centimeters long (Bridges et al, 1982;He and Prasad, 1990). New horizons appearing with the advent of PCFs have made the interaction of intense light pulses of high peak powers with matter over interaction lengths of hundreds of meters a reality.…”

Design of an ultracompact low-power all-optical modulator by means of dispersion engineered slow light regime in a photonic crystal Mach–Zehnder interferometer

“…Then we have calculated the wavelength dependence of the group indices (n g ) and the corresponding GVDs (β 2 ) for the even fundamental modes of W09Ws selectively infiltrated with optical fluids of refractive indices n f 1.75 from Series M and 1.85, 1.9, and 1.95 from Series H of Cargille liquids [31]. These liquids, according to [23,[32][33][34][35][36], can possess nonlinear Kerr parameters of about two orders of magnitudes larger than that of Si (1.2 × 10 −13 esu). Figure 2 compares the numerical data of three samples with n f 1.75, 1.85, and 1.95 as an example.…”

A theoretical study on the supercontinuum generation in a novel suspended liquid core photonic crystal fiber

“…As the material science engineering grows exponentially over the last decade, many novel nonlinear materials were developed, which rejuvenate the non-silica based fiber technology. Observation of different nonlinear phenomena in a hollow core fiber filled with nonlinear liquid was the very first successful attempt for nonlinearity enhancement with LCPCFs [47]. Recently, Zhang et.al., generated a very broad continuum with a hollow core fiber infiltrated with CS 2 liquid [48].…”