Broadband high-energy all-fiber laser at 1.6 μm
Abstract
A broadband high-energy all-fiber laser at 1.6-μm window with erbium-doped fiber mode locked by nonlinear polarization rotation technology is demonstrated. The direct output optical spectrum centered at 1.6 μm has a bandwidth of 52.4 nm. The fiber laser delivers a pulse energy of 3.9 nJ with 9.3-MHz repetition rate at 220-mW 976-nm pump power. Based on it, a wavelength-tunable optical source with wavelength tuning range from 1.6 μm to 1.8 μm is demonstrated through soliton self-frequency shift. To satisfy much longer wavelength demands in some special application scenario, e.g. deep brain imaging with multi-photon microscopy, a chirped pulse amplifier was constructed to boost the pulse energy to 14 nJ, and the wavelength can be tuned from 1.6 μm to 1.94 μm with those amplified pulses. These fiber sources at L-band and longer wavelength can explore a wider scope in deep bio-tissue imaging area for lower water absorption.
Additional Information
© 2017 IEEE. Manuscript received December 5, 2017; revised December 19, 2017; accepted December 19, 2017. Date of publication December 27, 2017; date of current version January 29, 2018. This work was supported by grants from the Research Grants Council of the Hong Kong Special Administrative Region, China (Project Nos. HKU 17205215, HKU 17208414, and CityU T42-103/16-N) and National Natural Science Foundation of China (N_HKU712/16); Innovation and Technology Fund (GHP/050/14GD); and University Development Fund of HKU.Additional details
- Eprint ID
- 84068
- DOI
- 10.1109/LPT.2017.2786461
- Resolver ID
- CaltechAUTHORS:20180103-150623024
- HKU 17205215
- Research Grants Council of the Hong Kong Special Administrative Region
- HKU 17208414
- Research Grants Council of the Hong Kong Special Administrative Region
- CityU T42-103/16-N
- 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
- Hong Kong University
- Created
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2018-01-03Created from EPrint's datestamp field
- Updated
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2021-11-15Created from EPrint's last_modified field