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Related Experiment Video

Updated: Jan 27, 2026

Blood Flow Imaging with Ultrafast Doppler

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Published on: October 14, 2020

Full-field ultrafast oscilloscope based on temporal imaging.

Zhi Qiao, Xue Pan, Yudong Yao

|March 17, 2019

Summary

A new full-field ultrafast oscilloscope recovers lost temporal phase information from ultra-fast transient processes. This advancement enables complete characterization of high-rate repetitive pulses using novel phase retrieval algorithms.

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Area of Science:

Optics and Photonics
Ultrafast Science
Metrology

Background:

Advancements in ultrafast lasers necessitate precise measurement of ultra-speed transient and dynamic processes.
Current ultrafast oscilloscopes using optical stretch methods are limited to temporal profile measurements, losing critical temporal phase information.
Complete characterization of transient phenomena requires both temporal profile and phase data.

Purpose of the Study:

To develop a full-field ultrafast oscilloscope capable of retrieving both temporal profile and phase of transient pulses.
To overcome the limitations of existing methods that discard temporal phase information.
To enable comprehensive analysis of high-rate repetitive transient events.

Main Methods:

Implementation of a full-field ultrafast oscilloscope architecture.
Application of two advanced temporal phase retrieval algorithms: the temporal annealing Gerchberg-Saxton (TAGS) algorithm and temporal ptychography.
Verification through extensive simulations and experimental validation.

Main Results:

Demonstration of a 230 GHz bandwidth ultrafast oscilloscope.
Successful retrieval of complete temporal information, including both profile and phase, for high-rate repetitive transient pulses.
Validation of the proposed methods' efficacy in recovering lost phase data.

Conclusions:

The developed full-field ultrafast oscilloscope successfully retrieves complete temporal information (profile and phase) of transient pulses.
The integration of TAGS and temporal ptychography significantly enhances measurement capabilities.
This technology opens new avenues for applications in phase encoding, phase-contrast imaging, and time-domain sensing.