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• Conference paper
  Woodward RI, Kelleher EJR, Runcorn TH, Popov SV, Torrisi F, Howe RCT, Hasan Tet al., 2014,

  Q-switched fiber laser with MoS<inf>2</inf>saturable absorber

  © 2014 Optical Society of America. A MoS2-based saturable absorber is fabricated using wet chemistry techniques. We use it to passively Q-switch a fiber laser at 1068 nm.

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• Conference paper
  Zhang M, Kelleher EJR, Runcorn TH, Popa D, Torrisi F, Ferrari AC, Popov SV, Taylor JRet al., 2014,

  Synchronously coupled fiber lasers and sum frequency generation using graphene composites

  Graphene mode-locked and self-sychronized fiber lasers are used for sum- frequency mixing in a graphene-polymer composite.

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• Journal article
  Purdie D, Popa D, Wittwer VJ, Ziang Z, Torrisi F, Ferrari ACet al., 2014,

  Sub-50 fs compressed pulses from a graphene-mode locked fiber laser

  , Optics InfoBase Conference Papers, ISSN: 2162-2701

  We demonstrate a graphene mode-locked fiber laser system generating 42 fs pulses with 53mW output power, ideal for high temporal resolution applications. © 2014 Optical Society of America.

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• Conference paper
  Purdie D, Popa D, Wittwer VJ, Ziang Z, Torrisi F, Ferrari ACet al., 2014,

  Sub-50 fs compressed pulses from a graphene-mode locked fiber laser

  We demonstrate a graphene mode-locked fiber laser system generating 42 fs pulses with 53 mW output power, ideal for high temporal resolution applications.

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• Conference paper
  Thomas S, Cole M, De Luca A, Torrisi F, Ferrari AC, Udrea F, Gardner JWet al., 2014,

  Graphene-coated Rayleigh SAW resonators for NO <inf>2</inf> detection

  , Pages: 999-1002, ISSN: 1877-7058

  © 2014 Published by Elsevier Ltd. This paper describes the development of a novel low-cost Rayleigh Surface Acoustic Wave Resonator (SAWR) device coated with a graphene layer that is capable of detecting PPM levels of NO 2 in air. The sensor comprises two 262 MHz ST-cut quartz based Rayleigh SAWRs arranged in a dual oscillator configuration; where one resonator is coated with gas-sensitive graphene, and the other left uncoated to act as a reference. An array of NMP-dispersed exfoliated reduced graphene oxide dots was deposited in the active area inside the SAWR IDTs by a non-contacting, micro ink-jet printing system. An automated Mass Flow Controller system has been developed that delivers gases to the SAWR sensors with circuitry for excitation, amplification, buffering and signal read-out. This SAW-based graphene sensor has sensitivity to NO 2 of ca. 25 Hz/ppm and could be implemented in a low-power low-cost gas sensor.

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• Journal article
  Jiang Z, Bonacchini GE, Popa D, Torrisi F, Ott AK, Wittwer VJ, Purdie D, Ferrari ACet al., 2014,

  Graphene saturable absorber power scaling laser

  , Optics InfoBase Conference Papers, ISSN: 2162-2701

  A solution-processed graphene-film coated on a fiber-based connector is used for stable, mode-locked femtosecond-duration pulses with 16mW average output power. © 2014 OSA.

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• Journal article
  Jiang Z, Bonacchini GE, Popa D, Torrisi F, Ott AK, Wittwer VJ, Purdie D, Ferrari ACet al., 2014,

  Graphene saturable absorber power scaling laser

  , Optics InfoBase Conference Papers, ISSN: 2162-2701

  A solution-processed graphene-film coated on a fiber-based connector is used for stable, mode-locked femtosecond-duration pulses with 16mW average output power. © 2014 Optical Society of America.

  • Abstract
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• Conference paper
  Jiang Z, Bonacchini GE, Popa D, Torrisi F, Ott AK, Wittwer VJ, Purdie D, Ferrari ACet al., 2014,

  Graphene saturable absorber power scaling laser

  © 2014 Optical Society of America. A solution-processed graphene-film coated on a fiber-based connector is used for stable, mode-locked femtosecond-duration pulses with 16 mW average output power.

  • Abstract
  • Cite
• Conference paper
  Jiang Z, Bonacchini GE, Popa D, Torrisi F, Ott AK, Wittwer VJ, Purdie D, Ferrari ACet al., 2014,

  Graphene saturable absorber power scaling laser

  , ISSN: 2162-2701

  A solution-processed graphene-film coated on a fiber-based connector is used for stable, mode-locked femtosecond-duration pulses with 16mW average output power. © 2014 Optical Society of America.

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• Conference paper
  Milne WI, Hu G, Howe RCT, Ferrari AC, Torrisi F, Hasan Tet al., 2014,

  Graphene for Plastic electronics

  , Pages: 368-369

  © 2014 ITE and SID. This paper will begin with a description of the liquid phase exfoliation method of graphene production. The remainder of the talk will concentrate on our work on the application of graphene to plastic electronics, including its use as a transparent conductor for transparent pianos and flexible smart windows.

  • Abstract
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• Conference paper
  Woodward RI, Kelleher EJR, Runcorn TH, Popov SV, Torrisi F, Howe RCT, Hasan Tet al., 2014,

  Q-switched fiber laser with MoS2 saturable absorber

  A MoS<inf>2</inf>-based saturable absorber is fabricated using wet chemistry techniques. We use it to passively Q-switch a fiber laser at 1068 nm. © 2014 Optical Society of America.

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  • Citations: 12
• Journal article
  Mary R, Brown G, Beecher SJ, Thomson RR, Popa D, Sun Z, Torrisi F, Hasan T, Milana S, Bonaccorso F, Ferrari AC, Kar AKet al., 2013,

  Evanescent-wave coupled right angled buried waveguide: Applications in carbon nanotube mode-locking

  , Applied Physics Letters, Vol: 103, ISSN: 0003-6951

  We present an evanescent-field device based on a right-angled waveguide. This consists of orthogonal waveguides, with their points of intersection lying along an angled facet of the chip. Light guided along one waveguide is incident at the angled dielectric-air facet at an angle exceeding the critical angle, so that the totally internally reflected light is coupled into the second waveguide. By depositing a nanotube film on the angled surface, the chip is then used to mode-lock an Erbium doped fiber ring laser with a repetition rate of 26 MHz, and pulse duration of 800 fs. © 2013 AIP Publishing LLC.

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• Journal article
  Brown G, Thomson RR, Beecher SJ, Mary R, Popa D, Sun Z, Torrisi F, Hasan T, Milana S, Bonaccorso F, Ferrari AC, Kar AKet al., 2013,

  Mode-locking using right-angle waveguide, based nanotube saturable absorber

  , Pacific Rim Conference on Lasers and Electro-Optics, CLEO - Technical Digest

  We report passive mode-locking of an Er-doped fiber laser using carbon nanotubes deposited on the facet of a right-angle optical waveguide. © 2013 IEEE.

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• Journal article
  Mary R, Brown G, Beecher SJ, Torrisi F, Milana S, Popa D, Hasan T, Sun Z, Lidorikis E, Ohara Set al., 2013,

  1.5 GHz picosecond pulse generation from a monolithic waveguide laser with a graphene-film saturable output coupler.

  , Opt Express, Vol: 21, Pages: 7943-7950, ISSN: 1094-4087

  We fabricate a saturable absorber mirror by coating a graphene- film on an output coupler mirror. This is then used to obtain Q-switched mode-locking from a diode-pumped linear cavity channel waveguide laser inscribed in Ytterbium-doped Bismuthate Glass. The laser produces 1.06 ps pulses at ~1039 nm, with a 1.5 GHz repetition rate, 48% slope efficiency and 202 mW average output power. This performance is due to the combination of the graphene saturable absorber and the high quality optical waveguides in the laser glass.

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• Journal article
  Lagatsky AA, Sun Z, Kulmala TS, Sundaram RS, Milana S, Torrisi F, Antipov OL, Lee Y, Ahn JH, Brown CTA, Sibbett W, Ferrari ACet al., 2013,

  2 μm solid-state laser mode-locked by single-layer graphene

  , Applied Physics Letters, Vol: 102, ISSN: 0003-6951

  We report a 2 μm ultrafast solid-state Tm: Lu2O3 laser, mode-locked by single-layer graphene, generating transform-limited ∼ 410 fs pulses, with a spectral width ∼ 11.1 nm at 2067 nm. The maximum average output power is 270 mW, at a pulse repetition frequency of 110 MHz. This is a convenient high-power transform-limited ultrafast laser at 2 μm for various applications, such as laser surgery and material processing. © 2013 American Institute of Physics.

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• Journal article
  Wang F, Jiang Z, Hasan T, Sun Z, Popa D, Torrisi F, Cho WB, Flahaut E, Ferrari ACet al., 2012,

  Double-wall carbon nanotube Q-switched and mode-locked two-micron fiber lasers

  , 2012 Conference on Lasers and Electro-Optics, CLEO 2012

  We fabricate double-wall carbon nanotube polymer composite saturable absorbers and demonstrate stable Q-switched and Mode-locked Thulium fiber lasers in a linear cavity and a ring cavity respectively. © 2012 OSA.

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• Journal article
  Wang F, Torrisi F, Jiang Z, Popa D, Hasan T, Sun Z, Cho WB, Ferrari ACet al., 2012,

  Graphene passively Q-switched two-micron fiber lasers

  , 2012 Conference on Lasers and Electro-Optics, CLEO 2012

  We demonstrate a passively Q-switched thulium fiber laser, using a graphene-based saturable absorber. The laser is based on an all-fiber ring cavity and produces ∼2.3 μs pulses at 1884nm, with a maximum pulse energy of 70 nJ. © 2012 OSA.

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• Journal article
  Wang F, Torrisi F, Jiang Z, Popa D, Hasan T, Sun Z, Cho WB, Ferrari ACet al., 2012,

  Graphene passively Q-switched two-micron fiber lasers

  , CLEO: Applications and Technology, CLEO_AT 2012

  We demonstrate a passively Q-switched thulium fiber laser, using a graphene-based saturable absorber. The laser is based on an all-fiber ring cavity and produces ~2.3 μs pulses at 1884nm, with a maximum pulse energy of 70 nJ. © 2011 Optical Society of America.

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• Journal article
  Wang F, Jiang Z, Sun Z, Popa D, Hasan T, Torrisi F, Ferrari ACet al., 2012,

  Dual-wavelength, carbon nanotube mode-locked fiber laser

  , 2012 IEEE Photonics Conference, IPC 2012, Pages: 505-506

  We demonstrate a dual-wavelength, carbon nanotube mode-locked Er fiber laser. The laser outputs two wavelengths at 1549nm and 1562nm, and each wavelength corresponds to pulse duration of ∼1.3ps and repetition rate of ∼11.27MHz. © 2012 IEEE.

  • Abstract
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• Journal article
  Wang F, Jiang Z, Hasan T, Sun Z, Popa D, Torrisi F, Cho WB, Flahaut E, Ferrari ACet al., 2012,

  Double-wall carbon nanotube Q-switched and mode-locked two-micron fiber lasers

  , CLEO: Science and Innovations, CLEO_SI 2012

  We fabricate double-wall carbon nanotube polymer composite saturable absorbers and demonstrate stable Q-switched and Mode-locked Thulium fiber lasers in a linear cavity and a ring cavity respectively. © 2011 Optical Society of America.

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