Mark J. Missey

Large-scale photonic integrated circuits

We present an overview of Infineras current generation of 100 Gb/s transmitter and receiver PICs as well as results from the next-generation 500 Gb/s PM-QPSK PICs.

InP Photonic Integrated Circuits

InP is an ideal integration platform for optical generation, switching, and detection components operating in the range of 1.3-1.6 m wavelength, which is preferred for data transmission in the most prevalent silica-based optical fiber. We review the current state of the art in advanced InP photonic ICs.

Current Status of Large-Scale InP Photonic Integrated Circuits

In this paper, the current state of the art for large-scale InP photonic integrated circuits (PICs) is reviewed with a focus on the devices and technologies that are driving the commercial scaling of highly integrated devices. Specifically, the performance, reliability, and manufacturability of commercial 100-Gb/s dense wavelength-division-multiplexed transmitter and receiver PICs are reviewed as well as next- and future-generation devices (500 Gb/s and beyond). The large-scale PIC enables significant reductions in cost, packaging complexity, size, fiber coupling, and power consumption which have enabled benefits at the component and system level.

Electro-optic spectral tuning in a continuous-wave, asymmetric-duty-cycle, periodically poled LiNbO(3) optical parametric oscillator.

We demonstrate electro-optic spectral tuning in a continuous-wave periodically poled LiNbO(3) (PPLN) optical parametric oscillator (OPO). We achieve 8.91 cm(-1) of rapid spectral tuning, with a linear tuning rate of 2.89 cm(-1) /(kV/mm), by applying electric fields up to +/-1.5 kV/mm across the crystal while it is operating within the OPO. Intentionally poling the PPLN crystal with an asymmetric domain structure enables tuning, and numerical predictions closely match the experimental observations. The tuning is considerably larger than the typical operational bandwidth of the OPO, indicating that we are in fact shifting the gain curve of the PPLN crystal.

Large-Scale InP Transmitter PICs for PM-DQPSK Fiber Transmission Systems

We report here the first demonstration of a large-scale monolithically integrated InP-based 10-channel 45.6-Gb/s per channel transmitter photonic integrated circuit employing polarization-multiplexed differential quadrature phase-shift keying modulation format.

Large-scale photonic integrated circuits for long-haul transmission and switching

Feature Issue on Nanoscale Integrated Photonics for Optical Networks Dense wavelength division multiplexed (DWDM) large-scale, single-chip transmitter and receiver photonic integrated circuits (PICs), each capable of operating at 100 Gbits/s, have been deployed in the field since the end of 2004. These highly integrated InP chips have significantly changed the economics of long-haul optical transport networks. First, a review of the ten-channel, 100 Gbits/s PIC is presented. Then two extensions of the technology are demonstrated; first is wide temperature, coolerless operation of the 100 Gbits/s PIC, and second is a single integrated chip with 40 channels operating at 40 Gbits/s, capable of an aggregate data rate of 1.6 Tbits/s.

Periodically poled lithium niobate monolithic nanosecond optical parametric oscillators and generators

We fabricated and characterized periodically poled lithium niobate monolithic optical parametric oscillators (OPOs) and generators. The compact monolithic devices were trivial to align and operate and provided widely tunable, nearly diffraction-limited, stable output pulses. Low thresholds and high conversion efficiencies were obtained when the devices were pumped with 3.5-ns 1.064-mum pulses. In addition, the monolithic OPO devices exhibited broad tuning by crystal rotation through noncollinear phase matching. The bandwidth-broadening effects exhibited in the noncollinear phase-matching geometry were measured and explained.

10 Channel, 100Gbit/s per channel, dual polarization, coherent QPSK, monolithic InP receiver photonic integrated circuit

A 10 channel, dual polarization, monolithically integrated, coherent QPSK receiver on InP operating at 100Gbit/s per channel is demonstrated.

Broadband mid-infrared generation with two-dimensional quasi-phase-matched structures

We report the use of highly elliptical pump beams to generate broadband, spatially-chirped mid-infrared light in periodically poled lithium niobate (PPLN). We fabricated PPLN crystals with a fan-out grating period varying continuously from 25.5 to 31.2 /spl mu/m across a 15-mm width and pumped them in both optical parametric generator and monolithic optical parametric oscillator configurations with a Q-switched Nd:YAG laser. Although the fan-out grating pattern is typically thought of as a continuously varying 1-D quasiphase-matched (QPM) structure, the elliptical pump beam illuminates the full 2-D structure of the fan. The phase-matching and gain characteristics of the crystals prefer noncollinear optical parametric generator operation for elliptical pump beams; however, collinear operation was achieved with polished plane- parallel crystal endfaces such that the Fresnel reflections set up a low- finesse monolithic cavity in the crystals themselves. The generated signal and idler beams were spatially chirped in the near field and angularly chirped in the far field while covering spectral bands as large as 1250 cm/sup -1/. With a simple modification, this system also offers an easy way to generate broadband optical frequency combs across the signal and idler spectral bands. We also present theoretical and modeling considerations for large-aperture pumped or flood illuminated 2-D QPM structures. The Fourier transform of the spatial variation in the nonlinear coefficient in a crystal generates a 2-D map of available grating vectors in wave vector mismatch space. This method can be used to glean phase-matching information from complicated 2-D structures that would be difficult to analyze using other methods.

Multi-channel coherent PM-QPSK InP transmitter photonic integrated circuit (PIC) operating at 112 Gb/s per wavelength

A 10-wavelength, polarization-multiplexed, monolithically integrated InP transmitter PIC is demonstrated for the first time to operate at 112 Gb/s per wavelength with a coherent receiver PIC.