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Octave-spanning supercontinuum is generated in chalcogenide, Ge23Sb7S70, waveguides pumped at 1550 nm. The 2μm side is subsequently amplified in a Thulium-doped fiber amplifier and utilized for second-harmonic generation (SHG). The generated signal has 55 dB of signal-to-noise ratio.
Large cavity, very low threshold single layer quantum dot laser diodes with threshold current density of 10 A/cm2, output power > 2 W, and very-low internal loss of 0.25 cm-1 are achieved at CW room-temperature. Mode-locked operation of a large cavity laser diode with 40 mum stripe width is demonstrated at 3.75 GHz repetition rate.
In this paper we report on our recent progress in using photonic digital-analog converters for arbitrary waveform generation. Optical arbitrary waveforms are generated using a time-domain approach based on an interfere metric modulator device.
The ability to modify the individual optical phases of close-spaced, phase-locked laser lines underlies spectrally phase encoded optical-CDMA networks offering signal obscurity and scrambling, passive code-exchange and routing, and spectral efficiency comparable to DWDM
Summary form only given. We present an initial feasibility demonstration of a WDM-compatible optical-CDMA system using 16 phase-locked laser lines within an 80 GHz tunable window as frequency chips and an ultrahigh frequency resolution phase shifting encoder/decoder.
The absolute Raman gain coefficient in families of new bulk glasses has been investigated. Raman gain coefficients over an order of magnitude larger and with spectral coverage twice that of fused silica have been measured.
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