Fiber parametric oscillator for the 2 μm wavelength range based on narrowband optical parametric amplification

Abstract

We describe a widely tunable synchronously pumped coherent source based on the process of narrowband parametric amplification in a dispersion-shifted fiber. Using an experimental fiber with a zero-dispersion wavelength of 1590 nm and pump wavelengths of 1530 to 1570 nm yields oscillations at 1970 to 2140 nm-the longest reported wavelength for a fiber parametric oscillator. The long-wavelength oscillations are accompanied by simultaneous short-wavelength oscillations at 1200 to 1290 nm. The parametric gain is coupled to stimulated Raman scattering. For parametric oscillations close to the Raman gain peak, the two gain processes must be discriminated from each other. We devised two configurations that achieve this discrimination: one is based on the exploitation of the difference in group delay between the wavelengths where Raman and parametric gain peak, and the other uses intracavity polarization tuning.

Efficiency and intensity noise of an all-fiber optical parametric oscillator

“…For decreasing ∆ f (increasing number of grid points) the predicted output drops and the idler output becomes noisy. This is shown more quantitatively in Figures 3(c,d) which depict the mean stationary output power and RIN versus ∆ f in the range from 1 GHz to 1 THz (number of grid points N g = 2 2 to 2 12 ). At large ∆ f , the RIN is determined by the quantum noise floor at -189 dB/Hz at 3 W power for this system.…”

“…The first FOPO system, termed the modulation instability laser, was theoretically and experimentally characterized by Nakazawa et al [5,6]. Experimental studies with similar apparatus have been conducted for both pulsed [7][8][9] and continuous wave (CW) configurations with high conversion efficiencies [10][11][12][13]. The conversion efficiency of these systems is subject to the gain of the HNLF, similar to FOPAs, but also depends on the transmittance of the signal within the FOPO and the relative phase of the waves under consideration [14].…”

Phase matching for parametric generation in polarization maintaining photonic crystal fiber pumped by tunable Yb-doped fiber laser

“…Design and development of dispersion shifted fibers (DSFs) with ZDW close to the wavelength of minimal attenuation in silica glasses (1.55 μm) resulted in extensive investigation of parametric processes in this spectral range [2][3][4]. Nevertheless, the DSFs enable wavelength conversion down to 1.2 μm only [5]. Now a great attention is attracted to a modeling and design of special photonic crystal fibers (PCFs).…”

CW parametric generation in polarization maintaining PCF pumped by Yb-doped fiber laser

“…In this case the phase matching condition is Designing and developing of dispersion shifted fibers (DSF) with the ZDW near the minimum optical attenuation in silica glass (1.55 μm) resulted in extensive investigation of parametric processes in that spectral range [2][3][4]. Nevertheless, the DSFs enable the wavelength conversion down to 1.2 μm only [5]. Now a great attention is attracted to modeling and designing of special photonic crystal fibers (PCF).…”