Ultrafast Pulsed All-Fiber Laser Based on Tapered Fiber Enclosed by Few-Layer WS2 Nanosheets

Reza Khazaeinezhad; Sahar Hosseinzadeh Kassani; Hwanseong Jeong; Kyung Jun Park; Byoung Yoon Kim; Dong Il Yeom; Kyunghwan Oh

doi:10.1109/LPT.2015.2426178

Ultrafast Pulsed All-Fiber Laser Based on Tapered Fiber Enclosed by Few-Layer WS₂ Nanosheets

Reza Khazaeinezhad, Sahar Hosseinzadeh Kassani, Hwanseong Jeong, Kyung Jun Park, Byoung Yoon Kim, Dong Il Yeom, Kyunghwan Oh

Department of Physics

Research output: Contribution to journal › Article › peer-review

95 Citations (Scopus)

Abstract

We demonstrate all-fiber mode-locked laser based on a tapered optical fiber saturable absorber (SA) enclosed in tungsten disulfide (WS₂) nanosheets. Tapered fibers were fabricated using the standard flame brushing method to an interaction length of 3 mm with waist diameters of 10 and 15 μ {m}. WS₂ nanosheets were prepared via a liquid phase exfoliation method to form a uniform dispersion. Subsequently, the WS₂ nanosheets were optically deposited along the interaction length of the tapered fibers by evanescent field interactions. We built a ring laser including the fabricated mode-lockers. The SA with a 10-μ {m} taper diameter delivers the pulses with a pulse duration of 369 fs and 3-dB spectral bandwidth of 7.5 nm; on the other hand, the output pulses using the mode-locker with 15-μ{m} waist diameter were found to have 563-fs pulse duration and 5.2 nm of 3-dB bandwidth. It is shown that the smaller waist diameter of tapered fiber causes wider spectral bandwidth of the ultrafast pulses and narrower 3-dB bandwidth.

Original language	English
Article number	7094233
Pages (from-to)	1581-1584
Number of pages	4
Journal	IEEE Photonics Technology Letters
Volume	27
Issue number	15
DOIs	https://doi.org/10.1109/LPT.2015.2426178
Publication status	Published - 2015 Aug 1

Bibliographical note

Publisher Copyright:
© 2015 IEEE.

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Electrical and Electronic Engineering

Access to Document

10.1109/LPT.2015.2426178

Cite this

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title = "Ultrafast Pulsed All-Fiber Laser Based on Tapered Fiber Enclosed by Few-Layer WS2 Nanosheets",

abstract = "We demonstrate all-fiber mode-locked laser based on a tapered optical fiber saturable absorber (SA) enclosed in tungsten disulfide (WS2) nanosheets. Tapered fibers were fabricated using the standard flame brushing method to an interaction length of 3 mm with waist diameters of 10 and 15 μ {m}. WS2 nanosheets were prepared via a liquid phase exfoliation method to form a uniform dispersion. Subsequently, the WS2 nanosheets were optically deposited along the interaction length of the tapered fibers by evanescent field interactions. We built a ring laser including the fabricated mode-lockers. The SA with a 10-μ {m} taper diameter delivers the pulses with a pulse duration of 369 fs and 3-dB spectral bandwidth of 7.5 nm; on the other hand, the output pulses using the mode-locker with 15-μ{m} waist diameter were found to have 563-fs pulse duration and 5.2 nm of 3-dB bandwidth. It is shown that the smaller waist diameter of tapered fiber causes wider spectral bandwidth of the ultrafast pulses and narrower 3-dB bandwidth.",

author = "Reza Khazaeinezhad and Kassani, {Sahar Hosseinzadeh} and Hwanseong Jeong and Park, {Kyung Jun} and Kim, {Byoung Yoon} and Yeom, {Dong Il} and Kyunghwan Oh",

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AU - Khazaeinezhad, Reza

AU - Kassani, Sahar Hosseinzadeh

AU - Jeong, Hwanseong

AU - Park, Kyung Jun

AU - Kim, Byoung Yoon

AU - Yeom, Dong Il

AU - Oh, Kyunghwan

PY - 2015/8/1

Y1 - 2015/8/1

N2 - We demonstrate all-fiber mode-locked laser based on a tapered optical fiber saturable absorber (SA) enclosed in tungsten disulfide (WS2) nanosheets. Tapered fibers were fabricated using the standard flame brushing method to an interaction length of 3 mm with waist diameters of 10 and 15 μ {m}. WS2 nanosheets were prepared via a liquid phase exfoliation method to form a uniform dispersion. Subsequently, the WS2 nanosheets were optically deposited along the interaction length of the tapered fibers by evanescent field interactions. We built a ring laser including the fabricated mode-lockers. The SA with a 10-μ {m} taper diameter delivers the pulses with a pulse duration of 369 fs and 3-dB spectral bandwidth of 7.5 nm; on the other hand, the output pulses using the mode-locker with 15-μ{m} waist diameter were found to have 563-fs pulse duration and 5.2 nm of 3-dB bandwidth. It is shown that the smaller waist diameter of tapered fiber causes wider spectral bandwidth of the ultrafast pulses and narrower 3-dB bandwidth.

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