C1 Project: TI: Active Ripple Cancellation of Switch-Mode DCDC Converters Drive circuits for large parallel arrays of red VCSELs Short-haul parallel optical communications for IO between integrated circuits using polymer waveguides on a printed circuit board require parallel arrays of VCSELs switching at frequencies of 1-3 GHz. To minimize power consumption, the VCSELs should emit light of a frequency with minimal transmission loss in the waveguide medium. A similar requirement exists for in-home consumer applications, where polymer fibers are more suitable than glass ones. These materials have a minimum loss near 650 nm, so red Vertical Cavity Surface Emitting Lasers (VCSELs) should be used. Red VCSELs have many other potential applications, including medical sensing and diagnostics, printing and industrial sensing. Many sensor applications typically require low noise, high analog precision drivers with feedback control to compensate for ambient and self-heating drift. We have designed and manufactured an Application Specific Integrated Circuit to capture high bandwidth signals and drive an array of VCSELs over a wide range of possible frequencies. During this project, we propose to build an optical testbed and evaluate this system in detail. II. Project Objectives a. Demonstrate 64 channel integrated ASIC and VCSEL assembly performance at a switching rate of 2 GHz. b. Quantify and model the contributions of the various noise sources in the system. c. Develop an appropriate feedback system to keep the output power of the VCSELs uniform across the 64 VCSELs in the array over duty cycle and ambient temperature.
|Effective start/end date||11/25/13 → 8/31/14|
- INDUSTRY: Various Consortium Members: $42,612.00
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