Abstract:We present polymer (PMMA) cladded chalcogenide (As 2 Se 3 ) hybrid microwires that realize optical parametric four-wave mixing (FWM) with wavelength conversion bandwidth as broad as 190 nm and efficiency as high as 21 dB at peak input power levels as low as 70 mW. This represents 3-30 x increase in bandwidth and 30-50 dB improvement in conversion efficiency over previous demonstrations in tapered and microstructured chalcogenide fibers with the results agreeing well with the simulations. These properties, combined with small foot-print (10 cm length), low loss (<4 dB), ease of fabrication, and the transparency of As 2 Se 3 from near-to-mid-infrared regions make this device a promising building block for lasers, optical instrumentation and optical communication devices.References and links
We present the first system penalty measurements for all-optical wavelength conversion in an integrated ring resonator. We achieve wavelength conversion over a range of 27.7 nm in the C-band at 2.5 Gb/s by exploiting four wave mixing in a CMOS compatible, high index glass ring resonator at approximately 22 dBm average pump power, obtaining < 0.3 dB system penalty.
We investigate the onset of nonlinear effects in hybrid polymer-chalcogenide optical microwires and show that they provide an enhanced Kerr nonlinearity while simultaneously mitigating stimulated Brillouin scattering as compared to both chalcogenide and silica optical fibers. It is shown in particular that the polymer cladding surrounding the microwire significantly broadens the Brillouin linewidth and increases the threshold, thus enabling Kerr nonlinear applications. We also study the influence of the wire diameter on the Brillouin dynamics and demonstrate that the Brillouin frequency shift can be finely tuned over a wide radio-frequency range.
We report the observation of modulation instability in the mid-infrared spectral region by pumping a hybrid polymerchalcogenide optical microwire with a femtosecond optical parametric oscillator operating at 2.6 µm. It is further shown that this modulation instability occurs in the normal dispersion regime through negative fourth-order dispersion and leads to far detuned parametric frequency conversion at 2 µm and 3.5 µm, despite the presence of a strong absorption band around 2.8 µm. Stochastic nonlinear Schrödinger equation simulations of mid-infrared modulation instability are in excellent agreement with experiments.
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