J . E . Bowers

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We propose and demonstrate a 1.45GHz bandwidth optical phase-lock loop receiver for linear optical phase demodulation. Using the receiver in a link application, a spurious free dynamic range of 125 dBHz is measured at 300MHz. ©2007 Optical Society of America OCIS codes: (250.3140) Integrated optoelectronic circuits, (060.1660) , Coherent communications(More)
We demonstrate a 16-channel, independently tuned waveguide surface grating optical phased array in silicon for two dimensional beam steering with a total field of view of 20° x 14°, beam width of 0.6° x 1.6°, and full-window background peak suppression of 10 dB.
A large number of novel devices have been recently demonstrated using wafer fusion to integrate materials with different lattice constants. In many cases, devices created using this technique have shown dramatic improvements over those which maintain a single lattice constant. We present device results and characterizations of the fused interface between(More)
We show theoretical and experimental results from a tunable laser, with its center wavelength in the C-band, designed using coupled-ring resonator mirrors. The effective cavity length enhancement and negative optical feedback obtained from the resonators helps to narrow the laser linewidth in a small form factor. We report a linewidth of 160 kHz and a(More)
We demonstrate a 40 Gb/s optical packet buffer with asynchronous and autonomous control for use in contention resolution. Layer-2 (packet recovery) measurements are presented with less than 1 dB power penalty up to 10 circulations. ©2006 Optical Society of America OCIS Codes: (060.2330) Fiber optics communications, (060.4250) Networks
This work proposes a new approach to create optical random access memory for 40-Gb/s optical telecommunications. Results of simulations that investigate the maximum achievable delay are also presented. The design combines silica waveguides for low loss recirculation with InP-based semiconductor devices for high gain and fast switching. This approach(More)
In this work we present the first fully-integrated free-space beam-steering chip using the hybrid silicon platform. The photonic integrated circuit (PIC) consists of 164 optical components including lasers, amplifiers, photodiodes, phase tuners, grating couplers, splitters, and a photonic crystal lens. The PIC exhibited steering over 23° x 3.6° with beam(More)
K. Bane, J. Bowers, A. Chao, T. Chen, F. J. Decker, R. L. Holtzapple, P. Krejcik, T. Limberg, A. Lisin, B. McKee, M. G. Minty, C.-K. Ng, M. Pietryka, B. Podobedov, A. Rackelmann, C. Rago, T. Raubenheimer, M. C. Ross, R. H. Siemann, C. Simopoulos, W. Spence, J. Spencer, R. Stege, F. Tian, J. Turner, J. Weinberg, D. Whittum, D. Wright, F. Zimmermann Stanford(More)
Introduction: Coherent phase modulated RF/photonic links have been proposed [1, 2] to realise high dynamic range analogue optical links, which require the use of an optical phase-locked loop (OPLL) as a linear phase demodulator. Through feedback, the OPLL forces the output phase response of a local optical phase modulator to mirror the phase of an incoming(More)
We present the results of searches for gravitational waves from a large selection of pulsars using data from the most recent science runs (S6, VSR2 and VSR4) of the initial generation of interferometric gravitational wave detectors LIGO (Laser Interferometric Gravitational-wave Observatory) and Virgo. We do not see evidence for gravitational wave emission(More)