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A new on‐chip diagnostic tool is developed, allowing for real‐time full characterization of waveguided ultrashort optical pulses. This technique, called transverse frequency‐resolved optical gating (T‐FROG), relies on second harmonic generation (SHG) in a transverse (surface emitting) geometry. The T‐FROG is implemented on a thin‐film lithium niobate (LN) platform, demonstrating its versatility and...
T‐FROG for On‐chip Optical Pulse Diagnostics
In article number 2201017, Huakang Yu, Zhi‐yuan Li, Ya Cheng, Jacob Khurgin, and colleagues present an on‐chip diagnostic tool, referred to as transverse frequency‐resolved optical gating, that provides temporal amplitude and phase profiles of ultrafast optical pulses directly inside photonic integrated circuits.
The access to real‐time in‐situ characteristics...
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