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Conference paperSun Z, Lin XC, Popa D, et al., 2011,
Wideband tunable, high-power, graphene mode-locked ultrafast lasers
, Optics InfoBase Conference Papers, ISSN: 2162-2701 -
Conference paperHasan T, Sun Z, Popa D, et al., 2011,
Broadband ultrafast pulse generation with double wall carbon nanotubes
, Optics InfoBase Conference Papers, ISSN: 2162-2701 -
Journal articleSun Z, Lin XC, Yu HJ, et al., 2011,
High-power ultrafast solid-state laser using graphene based saturable absorber
, Optics InfoBase Conference Papers, ISSN: 2162-2701We demonstrate a graphene based saturable absorber mode-locked Nd:YVO4 solid-state laser, generating ~14nJ pulses with ~1W average output power. This shows the potential for high-power pulse generation. © 2011 Optical Society of America.
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Journal articlePopa D, Sun Z, Torrisi F, et al., 2011,
Ultrafast and high-energy pulsed lasers with graphene mode-lockers
, Optics InfoBase Conference Papers, ISSN: 2162-2701 -
Journal articlePopa D, Sun Z, Hasan T, et al., 2011,
Sub-100fs pulse generation from a fiber oscillator mode-locked by nanotubes
, Optics InfoBase Conference Papers, ISSN: 2162-2701We report an ultrafast fiber laser based on carbon nanotube saturable absorber. 84 fs pulses are generated directly from the fiber oscillator with 61.2 nm spectral width. © 2011 Optical Society of America.
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Conference paperHasan T, Sun Z, Popa D, et al., 2011,
Broadband ultrafast pulse generation with double wall carbon nanotubes
, 2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference, CLEO EUROPE/EQEC 2011Materials with nonlinear optical properties are much sought after for ultrafast photonic applications. Mode-locked lasers can generate ultrafast pulses using saturable absorbers[1]. Currently, the dominant technology is based on semiconductor saturable absorber mirrors (SESAMs). However, narrow tuning range (tens of nm), complex fabrication and packaging limit their applications[2]. Single wall nanotubes (SWNTs) and graphene offer simpler and cost-effective solutions[1]. Broadband operation can be achieved in SWNTs using a distribution of tube diameters[1,3], or by using graphene[4-8], due to the gapless linear dispersion of Dirac electrons[8,9]. © 2011 IEEE.
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Conference paperSun Z, Lin XC, Popa D, et al., 2011,
Wideband tunable, high-power, graphene mode-locked ultrafast lasers
, 2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference, CLEO EUROPE/EQEC 2011Ultrafast passively mode-locked lasers with spectral tuning capability and high output power have widespread applications in biomedical research, spectroscopy and telecommunications [1,2]. Currently, the dominant technology is based on semiconductor saturable absorber mirrors (SESAMs) [2,3]. However, these typically have a narrow tuning range, and require complex fabrication and packaging [2,3]. A simple, cost-effective alternative is to use Single Wall Carbon Nanotubes (SWNTs) [4,10] and Graphene [10,14]. Wide-band operation is possible using SWNTs with a wide diameter distribution [5,10]. However, SWNTs not in resonance are not used and may contribute to unwanted insertion losses [10]. The linear dispersion of the Dirac electrons in graphene offers an ideal solution for wideband ultrafast pulse generation [10,15]. © 2011 IEEE.
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Journal articlePopa D, Sun Z, Hasan T, et al., 2011,
Graphene Q-switched, tunable fiber laser
, APPL PHYS LETT, Vol: 98, ISSN: 0003-6951 -
Journal articlePopa D, Sun Z, Hasan T, et al., 2011,
Sub-100fs pulse generation from a fiber oscillator mode-locked by nanotubes
, 2011 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) -
Journal articleSun Z, Lin XC, Yu HJ, et al., 2011,
High-power Ultrafast Solid-state Laser Using Graphene Based Saturable Absorber
, 2011 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) -
Conference paperPopa D, Sun Z, Torrisi F, et al., 2010,
Generation of 63-nJ pulses from a fiber oscillator modelocked by nanotubes
, ISSN: 2162-2701We mode-lock a fiber oscillator with cavity length of ~1500m using nanotubes, achieving 1.55ps pulses with pulse energy up to 63nJ at 134 KHz repetition rate. © 2010 Optical Society of America.
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BookSun Z, Hasan T, Popa D, et al., 2010,
Ultrafast fiber laser mode-locked by graphene based saturable absorber
, ISBN: 9781557528896A Graphene-based saturable absorber is fabricated using wet chemistry techniques. We use it to passively mode-lock an Erbium doped fiber laser. ~500fs pulses are produced at 1560nm with a 5.2nm spectrum bandwidth. © 2010 Optical Society of America.
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BookWang F, Popa D, Sun Z, et al., 2010,
Characterization of dynamic nonlinear absorption of carbon nanotube saturable absorber
, ISBN: 9781557528896Dynamic nonlinear absorption of composite-type single-wall carbon nanotube saturable absorbers is characterized using both femtosecond and picosecond pump pulses. Results are compared with numerical simulations based on two commonly used saturable absorber models. © 2010 Optical Society of America.
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Conference paperHasan T, Torrisi F, Sun Z, et al., 2010,
Solution-phase exfoliation of graphite for ultrafast photonics
, Pages: 2953-2957, ISSN: 0370-1972 -
Journal articlePopa D, Sun Z, Torrisi F, et al., 2010,
Sub 200 fs pulse generation from a graphene mode-locked fiber laser
, APPL PHYS LETT, Vol: 97, ISSN: 0003-6951 -
Journal articleSun ZP, Popa D, Hasan T, et al., 2010,
A stable, wideband tunable, near transform-limited, graphene-mode-locked, ultrafast laser
, NANO RES, Vol: 3, Pages: 653-660, ISSN: 1998-0124 -
Journal articleSun Z, Hasan T, Torrisi F, et al., 2010,
Graphene mode-locked ultrafast laser.
, ACS Nano, Vol: 4, Pages: 803-810, ISSN: 1936-086XGraphene is at the center of a significant research effort. Near-ballistic transport at room temperature and high mobility make it a potential material for nanoelectronics. Its electronic and mechanical properties are also ideal for micro- and nanomechanical systems, thin-film transistors, and transparent and conductive composites and electrodes. Here we exploit the optoelectronic properties of graphene to realize an ultrafast laser. A graphene-polymer composite is fabricated using wet-chemistry techniques. Pauli blocking following intense illumination results in saturable absorption, independent of wavelength. This is used to passively mode-lock an erbium-doped fiber laser working at 1559 nm, with a 5.24 nm spectral bandwidth and approximately 460 fs pulse duration, paving the way to graphene-based photonics.
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Conference paperWang F, Popa D, Sun Z, et al., 2010,
Characterization of Dynamic Nonlinear Absorption of Carbon Nanotube Saturable Absorber
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Conference paperSun Z, Hasan T, Popa D, et al., 2010,
Ultrafast Fiber Laser Mode-locked by Graphene Based Saturable Absorber
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Conference paperPopa D, Sun Z, Torrisi F, et al., 2010,
Generation of 63-nJ pulses from a fiber oscillator mode-locked by nanotubes
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