Five Simultaneously Q-Switch Mode-Locked Passive Laser Modulators

Chen, Junewen; Chen, Junnan

doi:10.1007/s10043-006-0427-5

Cited by 7 publications

(4 citation statements)

References 17 publications

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“…2.4). The relaxation time of the ionically-doped glass could be estimated based on the Chen et al [Che06] and Yumashev et al [Yum94] studies, to be on the order of tens of picoseconds. This is expected to be much longer than the duration of pump pulse and so the use of the slow saturable absorption model is appropriate.…”

Section: Characterisation Of Nonlinear and Linear Saturationmentioning

confidence: 99%

New materials, regimes and applications of fibre laser techonology

Zhang,

Ferrari,

Obraztsova

et al. 2014

International Photonics and OptoElectronics Meetings

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Nonlinear optics enables the manipulation of spectral and temporal characteristics of optical pulses interacting with a dielectric medium. Optical fibres, as a uniquely practical medium, provide an environment for effectively exploiting the nonlinear effects. This has facilitated the rapid growing interest in this field focused on the investigation of fibrebased sources incorporated with various novel saturable absorber devices for ultrashort pulse generation.This thesis reports a series of experiments exploring the ongoing research in the field of nonlinear optics, including the development of ultrafast mode-locked fibre sources and their applications in supercontinumm generation and third order parametric interactions in new carbon materials.Firstly, the integration of carbon-based materials with rare-earth doped media allows the demonstration of ultrafast mode-locked laser sources operating at wavelengths across the near-infrared region in a compact, low cost and environmentally robust scheme.Power scaling of such sources can be achieved by operating in the all-normal dispersion regime making use of a glass-substrate saturable absorber device that exhibits a higher damage threshold.Supercontinuum generation has been used as an effective method for spectral broadening. Pumping with a conceptually simple and reliable fibre-based system, a continuum covering from 2 to 3 µm is generated in a highly nonlinear GeO 2 fibre. This experiment demonstrates a robust and long-term stable source of radiation in an important band, coincident with a portion of the atmospheric transmission window.Finally, the demonstration of a simple and compact nano-material based dual-wavelength system shows the performance of such devices as a simultaneous saturable absorber and passive synchroniser. An experimental study of coherent frequency mixing at large frequency shifts in a graphene sample, pumped by a two-colour fibre-integrated source, proves the strong nonlinear response of this new carbon material. Woodward who not only provided company inside and outside of the lab, but were also happy to discuss and help all matters of my work and life in UK. In particular, I would like to thank Ed for providing me with much needed support, interesting discussions (especially on food and culture) and continued collaboration since I joined the group. Tim, for making couplers for the Tm-system. Thanks to Tim, Robbie (shared the same office over the past three years!), Ed, and Rob for endless support, spending hours and hours proof reading chapters of this thesis and cheering me up all the time. Thanks to the visitor from A*STAR (Singapore), Dr. Dora Hu (more like a sister), for proof reading and encouraging me to relax during the thesis writing.

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Section: Characterisation Of Nonlinear and Linear Saturationmentioning

confidence: 99%

New materials, regimes and applications of fibre laser techonology

Zhang,

Ferrari,

Obraztsova

et al. 2014

International Photonics and OptoElectronics Meetings

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“…where Δα is equivalent to the modulation depth, F(t) and F sat are the instantaneous and saturation fluence, respectively. This model of saturable absorption is appropriate due to the fact that the relaxation time of the ionically-doped glass which could be estimated based on Chen et al and Yumashev et al [11,15,16] to be on the order of tens of picoseconds, is expected to be much longer than the duration of pump pulse [15]. The corresponding saturation fluence, based on the slow absorber model, is 8.0 mJ cm −2 .…”

Section: Ocmentioning

confidence: 99%

“…Although these technologies offer many advantages, such as broadband and reliable operation, they are not without limitation, having drawbacks, namely, high production costs and relatively low damage thresholds. In contrast, ionically-doped colored glasses [9][10][11] used as a saturable absorber in fiber lasers may resolve these issues, providing a more thermally robust solution allowing potential for higher achievable output powers, supported by performance of mode-locked solid-state lasers based on this approach [12,13], as well as offering the potential for broadband operation. In this paper, using a Z-scan technique we measure the nonlinear transmission of a low-cost, commericially available ionically-doped colored glass filter (RG1000).…”

Section: Introductionmentioning

confidence: 99%

Characterization of nonlinear saturation and mode-locking potential of ionically-doped colored glass filter for short-pulse fiber lasers

Kelleher¹,

Попов²,

Taylor³

2013

Opt. Express

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The nonlinear saturable absorption of an ionically-doped colored glass filter is measured directly using a Z-scan technique. For the first time, we demonstrate the potential of this material as a saturable asborber in fiber lasers. We achieve mode-locking of an ytterbium doped system. Mode-locking of cavities with all-positive and net-negative group velocity dispersion are demonstrated, achieving pulse durations of 60 ps and 4.1 ps, respectively. This inexpensive and optically robust material, with the potential for broadband operation, could surplant other saturable absorber devices in affordable mode-locked fiber lasers.

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“…As laser hosts, the YAG, YVO 4 , GdVO 4 , LuVO 4 , YLF, YAP etc have been widely used for diode-pumped QML lasers due to their excellent properties, e.g. with Nd:YAG, Nd:YVO 4 , Nd:GdVO 4 , Nd:LuVO 4 , Nd:YLF, Nd:YAP etc crystals [9][10][11][12][13][14][15]. In order to pursue new laser active media for improving laser characteristics, lutetium aluminum garnet (LuAG) has been attracting a great deal of attention as one of the best potential laser hosts due to its high thermal conductivity and excellent physical and chemical properties.…”

Section: Introductionmentioning

confidence: 99%

Diode-pumpedQ-switched and mode-locked Nd:Lu₃Al₅O₁₂lasers

Zhao¹,

Zhao²,

Yang³

et al. 2013

Laser Phys. Lett.

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By using Nd:Lu3Al5O12 (Nd:LuAG) as the gain medium, GaAs as a passive saturable absorber and an acousto-optic (AO) modulator as an active Q-switch, a diode-pumped singly passively Q-switched and mode-locked (QML) Nd:LuAG laser saturable with GaAs and a doubly QML Nd:LuAG laser with GaAs and an AO are realized for the first time. The laser characteristics of the QML pulses have been measured. In comparison to the singly passively QML laser with GaAs, the doubly QML laser with AO and GaAs can generate more stable pulses with higher peak power. The experimental results show that Nd:LuAG is an excellent alternative crystal for diode-pumped QML pulsed generation.

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Five Simultaneously Q-Switch Mode-Locked Passive Laser Modulators

Cited by 7 publications

References 17 publications

New materials, regimes and applications of fibre laser techonology

New materials, regimes and applications of fibre laser techonology

Characterization of nonlinear saturation and mode-locking potential of ionically-doped colored glass filter for short-pulse fiber lasers

Diode-pumpedQ-switched and mode-locked Nd:Lu₃Al₅O₁₂lasers

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Five Simultaneously Q-Switch Mode-Locked Passive Laser Modulators

Cited by 7 publications

References 17 publications

New materials, regimes and applications of fibre laser techonology

New materials, regimes and applications of fibre laser techonology

Characterization of nonlinear saturation and mode-locking potential of ionically-doped colored glass filter for short-pulse fiber lasers

Diode-pumpedQ-switched and mode-locked Nd:Lu3Al5O12lasers

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Diode-pumpedQ-switched and mode-locked Nd:Lu₃Al₅O₁₂lasers