# Measurement of ultrashort optical pulses via time lens imaging in CMOS compatible waveguides

## 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.

## Key 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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Source: https://tomesphere.com/paper/1705.02570