Flexible pulse-stretching for a swept source at 2.0 μm using free-space angular-chirp-enhanced delay
Abstract
Dispersive pulse-stretching at 2.0 μm has long been hindered by the high intrinsic optical loss from conventional dispersive media. Here a flexible pulse-stretching technique at 2.0 μm is demonstrated over a broad bandwidth with large-scale dispersion and low intrinsic optical loss. The technique employs the newly proposed pulse-stretching scheme, namely, free-space angular-chirp-enhanced delay. Both normal and anomalous temporal dispersion (up to ±500 ps/nm) with low intrinsic loss (<6 dB) over a spectral bandwidth of ∼84 nm at 2.0 μm is obtained with low nonlinear effects. Based on this method, an optical wavelength-swept source at 2.0 μm is realized and applied to spectrally encoded imaging at a line scan rate of ∼19 MHz, proving the potential of this pulse-stretching technique for continuous single-shot measurements at the 2.0 μm wavelength regime, particularly for optical microscopy and spectroscopy.
Additional Information
© 2017 Optical Society of America. Received 16 October 2017; revised 17 November 2017; accepted 22 November 2017; posted 30 November 2017 (Doc. ID 309098); published 22 December 2017. Funding: Research Grants Council of the Hong Kong Special Administrative Region, China (CityU T42-103/16-N, HKU 17205215, HKU 17208414); National Natural Science Foundation of China (NSFC) (N_HKU712/16); Innovation and Technology Commission (ITF) (GHP/050/14GD).Additional details
- Eprint ID
- 84269
- DOI
- 10.1364/OL.43.000102
- Resolver ID
- CaltechAUTHORS:20180111-134220472
- CityU T42-103/16-N
- Research Grants Council of the Hong Kong Special Administrative Region
- HKU 17205215
- Research Grants Council of the Hong Kong Special Administrative Region
- HKU 17208414
- Research Grants Council of the Hong Kong Special Administrative Region
- N_HKU712/16
- National Natural Science Foundation of China
- GHP/050/14GD
- National Natural Science Foundation of China
- Created
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2018-01-11Created from EPrint's datestamp field
- Updated
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2021-11-15Created from EPrint's last_modified field