Time warps in photonic time stretch ADC and their mitigation

Author

Gupta, Shalabh ; Jalali, Bahram

Author_Institution

Dept. of Electr. Eng., Univ. of California, Los Angeles, Los Angeles, CA

fYear

2008

fDate

Sept. 9 2008-Oct. 3 2008

Firstpage

43

Lastpage

46

Abstract

We demonstrate a 10-GHz bandwidth digitizer with 7-effective bits of resolution and 52 dB SFDR, using photonic time stretch technique. To the best of our knowledge, this is the highest resolution analog-to-digital converter (ADC) of the same bandwidth, with at least an order of magnitude higher SNR than previously achieved. This is made possible by correction of distortion due to time warps, and non-linearities due to wavelength dependent bias variation in the Mach-Zehnder modulator. We also demonstrate concatenation of 30 wavelength interleaved time segments with high fidelity on the path to achieving continuous time operation.

Keywords

analogue-digital conversion; modulators; Mach-Zehnder modulator; analog-to-digital converter; bandwidth 10 GHz; photonic time stretch ADC; time warps; Application software; Bandwidth; Jitter; Optical distortion; Optical filters; Optical modulation; RF signals; Radio frequency; Signal resolution; Wavelength division multiplexing;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave photonics, 2008. jointly held with the 2008 asia-pacific microwave photonics conference. mwp/apmp 2008. international topical meeting on

Conference_Location

Gold Coast, Qld

Print_ISBN

978-1-4244-2168-8

Electronic_ISBN

978-1-4244-2169-5

Type

conf

DOI

10.1109/MWP.2008.4666630

Filename

4666630