Supercontinuum generation in a highly nonlinear fiber using a continuous wave pump

Dual-pump Raman amplification with increased flatness using modulation instability

“…When the signal from a high-power CW source travels through a section of suitable fiber, modulation instability (MI) causes the break-up of the continuous wave into a series of short pulses that then can be broadened due to self-phase modulation (SPM), four-wave mixing (FWM), Raman scattering (RS) and all other nonlinear interactions in the fiber. Eventually, if the input power is high enough and the fiber length allows it, even a supercontinuum can be generated [6,9]. For the application of the effect on Raman amplifiers, such an outcome is not desirable, and we are instead interested in exerting as much control as possible over the bandwidth of the broadened spectrum, in order to optimize the gain performance provided by the pump or pumps.…”

“…Therefore, alternative approaches to gain ripple suppression are of great practical and fundamental interest. Time-division multiplexing of the pumping waves (smart pumping) capable of producing a very flat gain has been proposed in [2], and another possibility for lowering residual Raman gain fluctuations with a fixed number of pump sources is to apply a nonlinearly-broadened pump [3] as originally demonstrated in [4], and shown later in (for a single pump wavelength) [5,6]. Spectral broadening of the pump in fiber requires some modulation of the coherent optical beam.…”

Supercontinuum from Zr-EDF using Zr-EDF mode-locked fiber laser

“…J.K. Ranka et al [9] demonstrated SC generation in a photonic crystal fiber (PCF) with an extremely small solid-core, generating an SC spanning over 550 THz in spectral width. Since then, there has been growing interest in SC generation using optical fibers and microstructured optical fibers fabricated from highly nonlinear glasses such as PCFs and highly nonlinear dispersion shifted fibers (HNLFs) [10][11][12][13][14][15][16][17][18] and in dual-core microstructured fibers [19]. On top of these, there are also reports on all fiber SC generation [20] and also SCs with high power outputs [21,22].…”

Development of Ultrabroadband Light Source Based on Stimulated Raman Scattering in P-doped Silica Optical Fiber for Optical Coherence Tomography

“…Recently, a fiber Raman laser has been considered as a possible broadband light source with a high spatial coherence. [8][9][10] Also, a component of the laser system is very simple to combine with a conventional nanosecond solidstate laser and an optical fiber, and recently, an OCT system has been constructed with a fiber Raman laser to measure coating in optical fiber manufacturing. 11) In a previous report, we constructed a broadband fiber Raman laser with a SiO 2 optical fiber pumped by a commercial narrow-band Ti:sapphire laser.…”