Task 1: All-Optical InP Wavelength Converters Milan Masanovic, Vikrant Lal, John Barton, Hubert Chou, Joe Summers, Zhaoyang Hu, Xuejin Yan, Dan Blumenthal, Larry Coldren, John Bowers

Performance Metrics and Target Goals l Resolution/Channel Spacing FSR (nm) Loss/ Gain (dB) Pout (mW) BW tswitch (ms) RIN (dB/Hz) AOWC 32 (C-Band) 100 GHz NA TBD 0.1 2.5 GHz 1.0 < -150 Tunable any lin to any lout operation Low noise figure Low power dissipation Low polarization dependence Robust dynamic range Digital and analog operation

Technical Approach Two-stage design: SOA cross-gain (XGM) and cross-phase modulation (XPM) Tunable any lin to any lout operation using fixed optical filters Integrated mode converters for low-loss fiber coupling

Single and Two-Stage Structures Input Analog or Digital Signal @ lin Optically Controlled MZI-SOA Modulator Fiber to PIC Mode Matching Wavelength Converted Analog or Digital Signal @ lout SOA Tunable Laser @ lout Optical Filter SOA Wavelength Select Output Gating Input Analog or Digital Signal @ lin Fiber to PIC Mode Matching Optically Controlled 2-Stage SOA-MZI-SOA Modulator SOA Optical Bandpass Filter lint Fixed Wavelength Laser lint Wavelength Converted Analog or Digital Signal @ lout lint SOA Optical Blocking Filter lint Tunable Laser @ lout SOA Wavelength Select Output Gating

Two-Stage AOWC Operation 1st Stage Wavelength Conversion 2nd Stage Wavelength Conversion Input Output lint lint l1 l32 l1 l32 l (mm) l (mm) 1.525 1.560 Fixed Band Reject Optical Filter 1.525 1.560 Fixed Bandpass Optical Filter C-Band C-Band

Two-Stage Advantages First stage SOA cross-gain (XGM) Down conversion only to optimize ER Convert to fixed polarization state of on-board laser Set quiescent output average power (SOA in saturation) Any input wavelength mapped to to internal wavelength Separate internal from input wavelengths using fixed filter Second stage cross-phase modulation (XPM) Regenerative digital Quiescent input operating point set by first stage SFDR management Set output wavelength with tunable laser Single polarization optimized Operate in inverting mode (XGM is inverting) Integrated mode converters for low-loss fiber coupling

Key Milestones: Baseline Demonstrate operational chip-on-carrier single-stage SOA-IWC with integrated tunable laser capable of tuning to 32 wavelengths (1550nm C-band). Measure analog and digital performance BER, extinction ratio @ 2.5 Gbps S12 parameter, RIN, NF, SMSR and SFDR @ 20 GHz Develop simulation software for active/passive/filter InP integrated photonic circuits The goal of this program is to investigate and develop the next generation of photonic integrated Chip-Scale optical wavelength converter and wavelength routing platform.

Task 1: Research Schedule