Abstract
We describe several concepts for real time shaping and detection of femtosecond laser pulses using optical nonlinearities. Cascaded second order wave mixing is used for real-time conversion of spatial-domain images to ultrafast time-domain optical waveforms. We experimentally demonstrate a cascaded nonlinearity arrangement allowing generation of complex amplitude femtosecond waveforms with high fidelity and good conversion efficiency. Single-shot, phase-sensitive detection of femtosecond pulses is demonstrated using both nonlinear wave-mixing and 2-photon absorption in semiconductor detector arrays. Using commercial silicon charge-coupled device (CCD), the latter approach allows detection of broadband ultrashort signals in the important wavelength range around 1.5 microns without phase-matching limitations. Finally we describe an approach to characterization of the multimode fiber using ultrashort pulse interferometry.
| Original language | English |
|---|---|
| Pages (from-to) | 58-69 |
| Number of pages | 12 |
| Journal | Proceedings of SPIE - The International Society for Optical Engineering |
| Volume | 4978 |
| DOIs | |
| State | Published - 2003 |
| Externally published | Yes |
| Event | Commercial and Biomedical Applications of Ultrafast Lasers III - San Jose, CA, United States Duration: 28 Jan 2003 → 30 Jan 2003 |
Keywords
- Interferometric correlation
- Nonlinear information processing
- Pulse imaging
- Pulse shaping
- Sonogram
- Space-time processes
- Two-photon absorption