Ultra-broadband spatiotemporal sweeping device for high-speed optical imaging
Abstract
In this work, we propose and demonstrate a spatiotemporal sweeping fiber bundle for ultra-fast optical diagnoses over a multioctave wavelength span, ranging from ∼400 nm to ∼2000 nm. This all-optical spatiotemporal sweeping is realized by precisely controlling the length increment between individual fibers in the fiber bundle. Here, a 200-ps pixel delay increment specifically enables a pixel readout rate of up to 5 GHz. Depending on different configurations of the fiber bundle, either 1D or 2D spatiotemporal sweeping can be realized. Moreover, the high peak power of the short pulse in each pixel can facilitate the highly sensitive optical detection. To showcase its ultra-broadband operation capability, we here perform ultra-fast optical microscopy at three distinctive wavelengths, which are 710 nm, 1030 nm, and 1600 nm, and achieve tens of MHz line-scan rate and few-micrometers resolution for all three experiments. It is anticipated that this inertia-free spatiotemporal sweeping device with ultra-broad bandwidth, GHz pixel readout rate, and high detection sensitivity is promising for ultra-fast optical diagnosis, particularly when hyperspectral characteristics are desired.
Additional Information
© 2018 Optical Society of America. Received 21 May 2018; revised 21 June 2018; accepted 24 June 2018; posted 25 June 2018 (Doc. ID 332173); published 19 July 2018. Funding: Research Grants Council of the Hong Kong Special Administrative Region, China (CityU T42-103/16-N, E-HKU701/17, HKU 17205215); National Natural Science Foundation of China (NSFC) (N_HKU712/16); Innovation and Technology Commission (ITF) (GHP/050/14GD).Additional details
- Eprint ID
- 89313
- DOI
- 10.1364/ol.43.003546
- Resolver ID
- CaltechAUTHORS:20180830-105710544
- CityU T42-103/16-N
- Research Grants Council of the Hong Kong Special Administrative Region, China
- E-HKU701/17
- Research Grants Council of the Hong Kong Special Administrative Region
- HKU 17205215
- Research Grants Council of the Hong Kong Special Administrative Region
- N_HKU712/16
- National Natural Science Foundation of China
- GHP/050/14GD
- Innovation and Technology Commission (China)
- Created
-
2018-08-30Created from EPrint's datestamp field
- Updated
-
2021-11-16Created from EPrint's last_modified field