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Multi-mode root preserving ptychographic phase retrieval algorithm for dispersion scan
We present a phase retrieval algorithm for dispersion scan (d-scan), inspired by ptychography, which is capable of characterizing multiple mutually-incoherent ultrafast pulses (or modes) in a pulse train simultaneously from a single d-scan trace. In addition, a form of Newton’s method is employed as a solution to the square root problem commonly encountered in second harmonic pulse measurement techniques. Simulated and experimental phase retrievals of both single-mode and multi-mode d-scan traces are shown to demonstrate the accuracy and robustness of the root preserving ptychographic algorithm (RPPA).
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- Award ID(s):
- 1903709
- PAR ID:
- 10253573
- Publisher / Repository:
- Optical Society of America
- Date Published:
- Journal Name:
- Optics Express
- Volume:
- 29
- Issue:
- 14
- ISSN:
- 1094-4087; OPEXFF
- Format(s):
- Medium: X Size: Article No. 22080
- Size(s):
- Article No. 22080
- Sponsoring Org:
- National Science Foundation
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