Multi-wavelength Q-switched erbium-doped fibre laser using saturable absorber based on carbon nanotube film

Anyi, C. L.; Ali, Nadir; Rahman, A.; Harun, Sulaiman Wadi; Arof, Hamzah; Ilmu, Bukit

doi:10.3116/16091833/14/4/212/2013

Cited by 19 publications

(9 citation statements)

References 12 publications

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“…Due to the presence of the modulators and other bulk devices in the cavity, the configurations of the widely used, actively Q‐switched solid‐state lasers are often relatively complicated . With the increasing popularity and performance improvement of fiber lasers, Q‐switched Erbium‐doped fiber (EDF) lasers have attracted more and more attention, which could have advantages in their size, weight and cost . Conversely, in contrast to the actively Q‐switching schemes, the passively Q‐switching techniques could have additional advantages such as simplicity and compactness.…”

Section: Introductionmentioning

confidence: 99%

“…Conversely, the multiwavelength Q‐switched lasers, which can simultaneously generate synchronized Q‐switched pulse trains at different center wavelengths, can be useful in airborne Lidar, terahertz generation, multiphoton dissociation of molecules, and other nonlinear optics or sensing applications . Very recently, by using the birefringence‐induced filtering effect, a dual‐wavelength Q‐switched EDF laser with a graphene saturable absorber and single‐walled CNTs have been reported.…”

Section: Introductionmentioning

confidence: 99%

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Dual-wavelength passively Q-switched Erbium Ytterbium codoped fiber laser based on a nonlinear polarization rotation technique

Sabran

Jusoh

Babar

et al. 2015

Microw. Opt. Technol. Lett.

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We report a room temperature all‐fiber dual‐wavelength Erbium Ytterbium codoped fiber laser (EYDFL) operating at 1543.3 and 1545.4 nm using a nonlinear polarization rotation (NPR) technique. An isolator is used in conjunction with a multilobed double‐clad Erbium Ytterbium codoped fiber to induce intensity‐dependent loss in a sufficiently high loss ring cavity to achieve dual‐wavelength and Q‐switching simultaneous operations. At the threshold pump power of 0.27 W, the EYDFL generates a sequence of pulses with repetition rate of 12.06 kHz and pulse width of 11.56 µs. When the multimode pump is increased to 0.60 W, the repetition rate can be tuned to 57.94 kHz. The lowest pulse width of 5.04 µs and the maximum pulse energy of 72.01 nJ are obtained at the pump power of 0.55 W. The simple and inexpensive dual‐wavelength Q‐switched NPR‐based laser has a big potential for applications in metrology, environmental sensing, and biomedical diagnostics. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:530–533, 2015

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dual-wavelength passively Q-switched Erbium Ytterbium codoped fiber laser based on a nonlinear polarization rotation technique

Sabran

Jusoh

Babar

et al. 2015

Microw. Opt. Technol. Lett.

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“…SESAMs also have limited operating bandwidth, typically few tens of nanometers [7] , which are not suitable for broadband tunable pulse generation. Compared with SESAMs, CNTs can be regarded as the broadband SAs, operated on Yb-doped [10] , Er-doped [11] , and Tmdoped fiber lasers [12] . However, its operation wavelength is related to diameter and chirality of the CNTs.Recently, graphene, a single layer of carbon in a hexagonal lattice, has been intensively researched due to its wonderful optical properties [13,14] .…”

mentioning

confidence: 99%

Q-switched Er-doped fiber laser with low pumping threshold using graphene saturable absorber

Rosdin¹,

Ahmad²,

Ali³

et al. 2014

中国光学快报

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Among the motives of developing Q-switched fiber lasers is to provide an alternative to the bulk pulsed solid-state lasers for many applications that require laser sources operating in the nanosecond to microsecond range such as range finding, remote sensing, industrial processing, and medicine [1][2][3][4] . They can be achieved by numerous schemes based on active and passive approaches. Passively Q-switched fiber lasers are normally realized by inserting a saturable absorber (SA) into the cavity. They feature a more compact geometry and simpler setup than active ones, which require additional switching electronics such as acousto-optic modulator [5] . Doped bulk crystals [6] , semiconductor SA mirrors (SES-AMs) [7] , and carbon nanotubes (CNTs) [8,9] are commonly used SAs in passive Q-switching. However, doped crystals that are mostly used in solid-state laser as SAs in fiber laser require extra elements (mirrors and lenses) to focus the fiber output into the crystal. Therefore their operating range is limited in a small bandwidth. SESAMs also have limited operating bandwidth, typically few tens of nanometers [7] , which are not suitable for broadband tunable pulse generation. Compared with SESAMs, CNTs can be regarded as the broadband SAs, operated on Yb-doped [10] , Er-doped [11] , and Tmdoped fiber lasers [12] . However, its operation wavelength is related to diameter and chirality of the CNTs.Recently, graphene, a single layer of carbon in a hexagonal lattice, has been intensively researched due to its wonderful optical properties [13,14] . In laser photonics, graphene SA has been widely used as a broadband SA to passively Q-switch or mode-lock fiber laser or solidstate laser, at different laser wavelengths ranging from 1 to 2 mm [15,16] . Till date, many works have been reported on the integrating graphene SA into fiber laser system for ultrashort-pulse generation. For instance, modelocked Er-doped fiber laser (EDFL) with stable solitonlike pulse output was achieved using a graphene from a chemical vapor deposition process [17] . We demonstrate a Q-switched EDFL with low pumping threshold using a graphene embedded into polyvinyl alcohol (PVA) composite. The SA is in the form of composite film, which is fabricated from graphene flakes obtained from electrochemical exfoliation. The SA is integrated in the EDFL by sandwiching the graphene thin film between two fiber connectors to achieve a stable pulse train operating at 1560 nm with a threshold pump power of 7.4 mW. The performance of the EDFL is also investigated with a graphene poly ethylene oxide (PEO) SA for comparison.Here the key part is the fabrication of SA film based on graphene sheet in PVA host. The PVA is a water-soluble synthetic polymer with monomer formula C 2 H 4 O, which has excellent film forming, emulsifying, and adhesive properties. It also has high-tensile strength, flexibility, high oxygen, and aroma barrier, although these properties are dependent on humidity. Graphene flakes were produced using electrochemical exfoliation process. In ...

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“…On the other hand, there is a growing interest in compact Q-switched laser sources operating in the mid-infrared spectral region (around 2 μm). It is driven mainly by various applications in the spectroscopy, optical communications, materials processing, manufacturing, sensing, medicine, and nonlinear optics [12,13]. Unlike active Q-switching, its passive counterpart represents more convenient and cost-effective way to achieve high-energy pulses because it requires no additional switching electronics.…”

Section: Introductionmentioning

confidence: 99%

Double-clad thulium/ytterbium co-doped octagonal-shaped fibre for fibre laser applications

Babar¹,

Sabran²,

Jusoh³

et al. 2014

Ukr. J. Phys. Opt.

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Abstract. We investigate the lasing performance of a new double-clad thulium/ytterbium co-doped octagonal-shaped fibre, basing on a cladding pump technique. The fibre is fabricated with the aid of a modified chemical vapour deposition combined with a solution doping technique. It is characterized by the Tm 3+ -and Yb 3+-cladding absorptions equal to 0.325 and 3.3 dB/m respectively at 790 and 976 nm. A triple-wavelength fibre laser operating at 1914.5, 1934.7 and 1953.6 nm is built that uses a 5 m long fibre in a ring configuration as a gain medium. With the fibre as long as 15 m, the ring laser produces the highest output power of 21.9 mW at the pump power of 3600 mW, with the lowest threshold pump power being equal to 1000 mW. When operating at 1961.4 nm, the maximal efficiency of 0.88 per cent is achieved for the gain medium length fixed at 10 m. We also demonstrate a Q-switched thulium/ytterbium-doped fibre laser that operates at 1977.5 nm and utilizes multi-walled carbon nanotubes as a gain medium. By varying the multimode 905 nm pump power from 1591.3 to 2261.5 mW, one can increase the pulse repetition rate from 18.8 to 50.6 kHz, while the pulse width then decreases from 8.6 to 1.0 µs. The maximum pulse energy 5.71 nJ is obtained at the pump power 2100 mW.

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Multi-wavelength Q-switched erbium-doped fibre laser using saturable absorber based on carbon nanotube film

Cited by 19 publications

References 12 publications

Dual-wavelength passively Q-switched Erbium Ytterbium codoped fiber laser based on a nonlinear polarization rotation technique

Dual-wavelength passively Q-switched Erbium Ytterbium codoped fiber laser based on a nonlinear polarization rotation technique

Q-switched Er-doped fiber laser with low pumping threshold using graphene saturable absorber

Double-clad thulium/ytterbium co-doped octagonal-shaped fibre for fibre laser applications

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