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Two time-resolved experimental methods have been used for characterization of the non-linear optical response of chalcogenide glasses of the system As-S-Se-Te in IR and THz ranges upon excitation by femtosecond laser pulses at 800 nm wavelength. Photoinduced conductivity and refractivity were studied by using a rate equation model.
We demonstrate a switchable dual-wavelength synchronously pulsed fiber laser Q-switched by graphene saturable absorber. Wavelength-resolved studies on the output Q-switched pulses show that despite of large wavelength spacing up to 26 nm, the two Q-switched pulses at each individual wavelength can be temporally synchronized with per-pulse energy up to 70 nJ. Further experiments show that by adjusting...
We demonstrate 10×456-Gb/s single-carrier DP-16QAM transmission over 8×l00-km of ULAF at a channel spacing of 70 GHz (6.1 b/s/Hz), using coherent detection with an analog-to-digital converter whose bandwidth is only 5.3% above Nyquist sampling.
We introduce a technique to monitor the polarization dependent impairments in optical links at tens of MHz speeds. Experimentally, we capture up to 10 ps PMD values for 5.8-nm optical bandwidth at 36 MHz refresh rates.
Summary form only given. Frequency-selective recording materials have been extensively studied for optical data storage and other applications. We demonstrate here a new type of process that utilizes both the spatial and spectral processing capabilities of such recording materials. In this process, spatial-spectral gratings, preprogrammed into a frequency-selective material, process and deflect optical...
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