Integrated Optical Wavelength Converters and Routers for ...

Integrated Optical Wavelength Converters and Routers for ...

Integration Platforms University of California Santa Barbara Chip-Scale WDM Program Task Area: Integration Platforms Wavelength Converter Enhancements Using QWI James Raring, Erik Skogen, Jon Barton, Larry Coldren University of California Santa Barbara Chip-Scale WDM Program Overview Objective Develop a novel QWI process for the fabrication of CQW wavelength-agile PICs to allow for the monolithic integration of high power SGDBRs with other optimized components

Approach Impurity-free vacancy-enhanced QWI Accomplishments Achieved 3 band edges in single PIC Monolithically integrated optimized SGDBRs with EAMs Main issues OEIC: Improve EAM design for better absorption and bandwidth AOWC: Optimize SOA design for low saturation power University of California Santa Barbara Chip-Scale WDM Program Quantum Well Intermixing Theory Impurity-free vacancy-enhanced quantum-well-intermixing Theory Create vacancies Thermal process to diffuse vacancies Vacancies allow atoms to exchange positions

Smears the well/barrier interface, increasing the quantized energy level University of California Santa Barbara g1 g2 Chip-Scale WDM Program Quantum Well Intermixing Process Novel QWI process Ability to achieve multiple band edges with a single implant University of California Santa Barbara Chip-Scale WDM Program

Offset Vs CQW - 50% larger confinement factor in CQW 50% more modal gain University of California Santa Barbara Chip-Scale WDM Program Advantages for Wavelength Converters Low Threshold High Power SGDBR Lasers - 50% more modal gain with centered quantum wells - Higher overall efficiency AOWC Low saturation power SOAs -Enhanced cross-gain modulation University of California Santa Barbara OEIC Efficient EA Modulator - Higher /V with shallow MQWs -Reduced length and higher speed

Chip-Scale WDM Program Initial SGDBR/EAM Results: PL Achieved three desired band edges across wafer Monolithically integrated widely-tunable laser with EAM University of California Santa Barbara Chip-Scale WDM Program SGDBR CQW BRS Cross Section 1.7um ridge 7 x 65 wells 8 x 80 barriers

Proton Implant 10um mask in gain 4um mask in EAM University of California Santa Barbara Chip-Scale WDM Program SGDBR Results Power Out and Voltage Vs Current 1.6 13.5 1.2 9 0.8 4.5 0.4

Ith = 8.2 mA i = 85% Voltage (V) Power (mW) 18 Slope Efficiency = 25% 17 mW @ 100 mA ia = 14.4 1/cm ip = 2.8 1/cm 0 0 20 40 60 80 0

100 Current (mA) University of California Santa Barbara Chip-Scale WDM Program EAM Frequency Response 175um EAM Frequency Response 5 5 0 0 Normalized Response (dB) Normalized Response (dB) 125um EAM Frequency Response

-5 -10 -15 Non BRS Implanted 4um BRS Implant Mask -5 -10 -15 Non BRS Implanted 4um BRS Implant mask -20 -20 -25 -25 0

5 10 Frequency (GHz) 15 20 0 5 10 15 20 Frequency (GHz) Capacitance due to homojunction can be reduced with tighter implant Implanted EAM appears to be limited by pad capacitance - No pad capacitance on wavelength converter design

University of California Santa Barbara Chip-Scale WDM Program EAM DC Absorption 125um EAM DC Absorption 5 Extinction (dB) 0 -5 7QW (1550nm) 10QW (1555nm) -10 -15 -20 -25 -8

-7 -6 -5 -4 -3 -2 -1 0 EAM Bias (V) -Add quantum wells for increased absorption -Results in ~ 1V/10dB with 200um length in 10 QW University of California Santa Barbara Chip-Scale WDM Program

Future Work Improve modulator bandwidth for OEIC Minimize EAM parasitics Low k dielectric under interconnect for reduced capacitance Tighter implant profiles for reduced homojunction capacitance Explore traveling wave designs EA and Mach-Zehender modulators Improve EAM efficiency for OEIC Redesign active region for increased absorption Develop technology for higher-efficiency AOWC Design SOAs with low saturation power Fabricate OEIC wavelength converters using QWI Fabricate AOWC wavelength converters using QWI University of California Santa Barbara Chip-Scale WDM Program

Recently Viewed Presentations

  • Media Millennials: Employment and Ethics for a New

    Media Millennials: Employment and Ethics for a New

    An Iowa substitute/student teacher contacted a 14 year old special education student via snapchat and coerced her into meeting him late at night at his home. Scenarios to consider: You discover that a teacher has been texting multiple students frequently.
  • CHAPTER 8 STRATEGY IN THE GLOBAL ENVIRONMENT 2015

    CHAPTER 8 STRATEGY IN THE GLOBAL ENVIRONMENT 2015

    Factor endowments. Nature of home demand for the industry's product or service. Local demand conditions. Presence or absence in the nation of supplier and related industries that are internationally competitive. Related and supporting industries.
  • HCaTS Overview

    HCaTS Overview

    FAR Part 16.505 Ordering Procedures. Ordering Period: 10 Years (5-yr Base and one 5-yr Option) Non-Commercial & Commercial Requirements-- Building Maintenance and Operation-- One Acquisition Solution for Integrated . Services-- Human Capital and Training Solutions
  • Chapter 14

    Chapter 14

    - Oncoming traffic present, yellow lines in the center of street, traffic signal facing three directions, one way street sign present, we have left turn lane, oncoming traffic does not have a special turn lane, parked cars facing opposite directions,...
  • The 2018 US-China Trade Conflict After 40 Years of Special ...

    The 2018 US-China Trade Conflict After 40 Years of Special ...

    The US view of the overall trend was that China had continually pursued policies that operated in grey areas of the WTO, a system with rules better built to mediate trade cooperation between market economies. China's economic size imposed unsustainable...
  • Trait Theories - University of Massachusetts Dartmouth

    Trait Theories - University of Massachusetts Dartmouth

    Trait Theories Basic Assumptions and Central Points behavior determined by stable generalized traits basic qualities that exist within a person and express themselves across situations goal of trait psychology: determine those trait dimensions determine where people stand relative to others...
  • Balancing detailed planning and needed adaptability: A hybrid

    Balancing detailed planning and needed adaptability: A hybrid

    Sprint planning meeting. Prepare Sprint spreadsheet for the iteration: Tasks and their effort estimates should come from the person who will be responsible for completing the task. A task is an item that can be started and finished in one...
  • Department of Veterans Affairs Vocational Rehabilitation and Employment

    Department of Veterans Affairs Vocational Rehabilitation and Employment

    VR&E Benefits and GI Bill . Is VR&E Program the same as the GI Bill? No. GI Bill is an educational benefits program. The purpose of the VR&E Program is to help Veterans with service-connected disabilities and barriers to employment...