Hybrid optical integrator based on silicon-on-insulator platform

Tae Won Huh; Azad Siahmakoun

doi:10.1117/12.2320306

7 September 2018 Hybrid optical integrator based on silicon-on-insulator platform

Tae Won Huh, Azad Siahmakoun

Proceedings Volume 10751, Optics and Photonics for Information Processing XII; 107510D (2018) https://doi.org/10.1117/12.2320306
Event: SPIE Optical Engineering + Applications, 2018, San Diego, California, United States

Abstract

A hybrid optical integrator is a recirculating loop that performs oversampling typically for an analog input using the crossgain modulation (XGM) in a semiconductor optical amplifier (SOA). The modulated input signal changes the gain of the loop through XGM and thus modifies the loop accumulation. This paper presents hybrid optical integrator for an all-optical analog-to-digital converter based on silicon photonics platform. The device consists of silicon waveguides of dimension 220 × 500 nm (thick × width) and approximately 2,800 μm total loop length, input and output grating couplers for 1550 nm signal, directional couplers, and external components (SOA, optical isolator and band-pass filter). All devices are designed for fabrication on the SOI wafer using E-Beam lithography. A theoretical model for the system is developed and simulated with Lumerical software and Matlab that accounts for critical design parameters such as the loop length, coupling coefficient, and gain in the SOA. The 3-dB couplers were designed and loop length was minimized to reduce the propagation loss through the silicon waveguide and increase the sampling frequency. From the simulation, total loss of silicon photonics device at one round trip is approximately 27 dB. The system is characterized for square waves at Giga- Hertz input frequencies. Simulation results show excellent agreement with the theoretical model of leaky integrator. The operation frequency of the integrator can be increased from MHz up to GHz by replacing fiber cable to silicon waveguide, leading to a free-spectral range of approximately 4.17 GHz.

Conference Presentation

Citation Download Citation

Tae Won Huh and Azad Siahmakoun "Hybrid optical integrator based on silicon-on-insulator platform", Proc. SPIE 10751, Optics and Photonics for Information Processing XII, 107510D (7 September 2018); https://doi.org/10.1117/12.2320306

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available