Measurement of ultrashort optical pulses via time lens imaging in CMOS compatible waveguides
Alessia Pasquazi, Yongwoo Park, Sai T.Chu, Brent .E. Little,, Fran\c{c}ois L\'egar\'e, Roberto Morandotti, Jos\'e Aza\~na, and David J., Moss
TL;DR
This paper presents a method for measuring ultrashort optical pulses using time lens imaging in CMOS-compatible waveguides, achieving high resolution and broad time window for pulse characterization.
Contribution
It introduces a novel approach for temporal measurement of subpicosecond pulses using four wave mixing in CMOS-compatible waveguides, with high resolution and efficiency.
Findings
Achieved 400fs temporal resolution
Demonstrated measurement over 100ps time window
Used around 1W peak pump power in C-band
Abstract
We demonstrate temporal measurements of subpicosecond optical pulses via time-to-frequency conversion in a 45cm long CMOS compatible high index glass spiral waveguide. The measurements are based on efficient four wave mixing in the C-band, using around 1W of peak pump power. We achieve a resolution of 400fs over a time window of 100ps, representing a time-bandwidth product > 250.
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