Photodiode-based phase-retrieval ultrafast waveform measurements
Resource
Lasers and Electro-Optics, 1999. CLEO '99. Summaries of Papers Presented at the Conference on
Journal
Lasers and Electro-Optics, 1999. CLEO '99. Summaries of Papers Presented at the Conference on
Pages
-
Date Issued
1999-05
Date
1999-05
Author(s)
Yau, Tai-Wei
Jau, Yuan-Yu
Lee, Chau-Hwang
Wang, Jyhpyng
DOI
N/A
Abstract
Summary form only given. Frequency-resolved optical gating (FROG) is becoming a standard method for characterizing the amplitude and phase of ultrashort pulses. In FROG, the optical waveform is calculated from the power spectrum of the autocorrelation signal generated by nonlinear wave mixing. As discussed previously, nonlinear wave mixing has the following disadvantages: (1) To measure sub-50-fs pulses, a crystal as thin as several tens of micrometers is required to avoid dispersion-induced pulse broadening and to ensure a sufficiently broad phase-matching bandwidth. (2) Wave mixing in thin nonlinear crystals is intrinsically an inefficient process. This sets a limit on the sensitivity. We developed a phase-retrieval waveform measurement technique by using only photodiodes. Because the nonlinear signal was obtained from two-photon-induced photocurrent, the above disadvantages were eliminated.
SDGs
Type
journal article
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