Greg Fish

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—Sampled-grating distributed Bragg grating (SGDBR) laser-based widely tunable optical transmitters are investigated for application in high-performance analog links. More than 45 nm tuning range, 40 dB sidemode suppression ratio, and peak relative intensity noise below 153 dB/Hz is measured. SGDBR lasers integrated with semiconductor optical amplifiers and(More)
—A widely tuneable electroabsorption-modulated sampled-grating distributed Bragg reflector laser, integrated with a semiconductor optical amplifier is characterized for analog applications. The wavelength can be tuned anywhere from 1522 to 1573 nm. The suboctave spurious-free dynamic range (SFDR) is between 125–127 dBHz 4 5 measured at eight sampled(More)
This paper demonstrates a rapid and full hitless defragmentation method in elastic optical networks exploiting a new technique for fast wavelength tracking in coherent receivers. This technique can be applied to a single-carrier connection or each of the subcarriers forming a super-channel. A proof-of-concept demonstration shows hitless defragmentation of a(More)
Integration of active optical components typically serves five goals: enhanced performance, smaller size, lower power dissipation, higher reliability, and lower cost. We can differentiate between horizontal and vertical integration schemes. Horizontal integration combines many elements of the same functionality, like laser arrays. Vertical integration(More)
—We present a silicon photonics optical link utilizing heterogeneously integrated photonic devices driven by low-power advanced 32-nm CMOS integrated circuits. The photonic components include a quantum-confined Stark effect electroabsorp-tion modulator and an edge-coupled waveguide photodetector, both made of III–V material wafer bonded on(More)
We report on a sampled grating DBR laser monolithically integrated with an electroabsorption modulator and semiconductor optical amplifier. A fiber coupled time-averaged power in excess of 3 dBm across a 40 nm tuning range and 2.5 Gb/s transmission over 200 km of standard fiber are achieved.
—Generation of 40-GHz alternate-phase pulses is demonstrated using a dual-mode-locked sampled-grating distributed Bragg reflector laser. More than 10-dB extinction and 20-dB sidemode suppression ratio is measured over the 40-nm tuning range of the laser. Based on captured phase noise spectra, the timing jitter is estimated in the 0.35–0.41-ps range. The(More)
Generation and transmission of 10 Gbps duobinary signals is demonstrated using an integrated widely-tunable SGDBR laser and Mach-Zehnder modulator over a wavelength range of 1538nm – 1564nm. 1. Introduction Duobinary modulation has the advantage of more compact modulated optical spectral width compared to standard NRZ modulation [1]. This provides improved(More)
Chirp-controlled optical modulation is demonstrated using a voltage division scheme applied to a long-section phase modulator to compensate for the positive chirp of an electroabsorption modulator arranged in a tandem configuration. Both modulators are integrated with a semiconductor optical amplifier (SOA) and a sampled-grating distributed Bragg reflector(More)