All-Fiber ${Q}$-Switched Ring Laser With Increased Repetition Rate

Cheng, Xiangguo; Shum, Ping; Tse, Chun Ho; Wu, Rongbo; Tan, W.C.; Tang, Ming; Zhang, Jie

doi:10.1109/lpt.2008.921091

Cited by 8 publications

(10 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As shown in inset of Figure c, the signal‐to‐noise ratio (SNR) is about 25 dB, which means that the influence of interaction between the birefringence effect of the fiber and the nonlinear optical effect of the pulse and PbS is unavoidable. In addition, it may be the effect of high order group velocity dispersion, spectral modulation, and self‐phase modulation on the pulse SNR . The long‐range distribution of the RF spectrum is depicted in Figure c.…”

Section: Resultsmentioning

confidence: 99%

PbS Nanoparticles for Ultrashort Pulse Generation in Optical Communication Region

Zhang

Qyyum

et al. 2018

Part & Part Syst Charact

View full text Add to dashboard Cite

Lead sulfide (PbS) has attracted great attention due to its unique electronic, optical, and chemical properties. In particular, the narrow bandgap of PbS (≈0.37 eV) makes it very suitable for the ultrafast application in optical communication or even longer wavelength region. In this work, PbS nanoparticles' (NPs) dispersion without any polymer is utilized as saturable absorber (SA) to generate ultrafast pulse in a fiber ring laser for the first time. The characterization and nonlinear properties of PbS NPs are investigated experimentally. PbS NPs are deposited on a flange to compose a nonlinear device. The nonlinear absorption is measured by a power‐dependent method with a modulation depth of 12.2%. Most importantly, PbS NPs can be applied for the ultrafast photonics applications. A compact mode‐locked fiber laser with 1.01 ps pulse duration, 2.93 nm spectral width, and 3.97 MHz repetition rate at 1533 nm is successfully achieved with long time stability. The output laser is detected with a good stability for more than 1 month without any degradation. This work can demonstrate that the PbS NPs' dispersion is indeed a new and excellent photonics material for SA photonics, photoconductive detection, and optical modulator, etc.

show abstract

Section: Resultsmentioning

confidence: 99%

PbS Nanoparticles for Ultrashort Pulse Generation in Optical Communication Region

Zhang

Qyyum

et al. 2018

Part & Part Syst Charact

View full text Add to dashboard Cite

show abstract

“…The incorporation of fiber-Bragg gratings (FBGs) into fiber lasers enables simple, compact and robust all-fiber laser cavities, eliminating the need for bulk-optic components. Further, the ability to tune the Bragg wavelength of an FBG in a fiber laser can add functionality to the allfiber laser system, such as laser wavelength tunability, and polarization selectivity and switching [1,2]. In particular, tuning the wavelength of an FBG in an all-fiber laser cavity has been used to achieve active Q-switching [3].…”

Section: Introductionmentioning

confidence: 99%

All-optical, actively Q-switched fiber laser

Williams¹,

Jovanović²,

Marshall³

et al. 2010

Opt. Express

View full text Add to dashboard Cite

All-fiber lasers offer increased robustness and simplicity over other fiber laser systems. Current active Q-switching techniques for all-fiber lasers rely on electro-mechanical transducers to strain-tune an intra-cavity fiber-Bragg grating, which adds complexity and can lead to vibrational sensitivity. An all-optical technique for achieving active Q-switched operation is a more elegant approach and would maintain the inherent robustness and simplicity of an all-fiber laser system. In this work, we studied the optical tuning of a fiber-Bragg grating by resonant optical pumping and optimized it for application to active systems. We incorporated an optically-tunable fiber-Bragg grating into a fiber laser and demonstrated active Q-switching at 35 kHz with this all-optical, all-fiber laser system. We highlight the potential to operate at >300 kHz with the current embodiment. To our knowledge, this is the first demonstration of an optically-driven active Q-switch in a fiber laser. Further potential to operate at MHz frequencies is discussed.

show abstract

“…4 Q-switched operation can be achieved in an all-fibre laser by modulating the relative spectral alignment of fibre-Bragg gratings in the cavity. 5 Dynamic control of the resonance wavelength of FBGs in fibre laser systems is also useful as a means for laser stabilisation, laser wavelength tunability, polarization selectivity and switching. 1,5 Typical methods for modulating the resonance wavelength of an FBG include thermal, strain and compression tuning.…”

Section: Introductionmentioning

confidence: 99%

“…5 Dynamic control of the resonance wavelength of FBGs in fibre laser systems is also useful as a means for laser stabilisation, laser wavelength tunability, polarization selectivity and switching. 1,5 Typical methods for modulating the resonance wavelength of an FBG include thermal, strain and compression tuning. These methods require bulky components to be incorporated into the fibre laser design, which limits their tuning speed and range of application.…”

Section: Introductionmentioning

confidence: 99%

“…These methods require bulky components to be incorporated into the fibre laser design, which limits their tuning speed and range of application. 5 All-optical control of the resonance wavelength of an FBG has the potential to offer remote system control and faster switching speeds, 6 while maintaining the inherent robustness of the all-fibre laser system. In order to achieve this, the FBG must be inscribed in a fibre with a resonant absorption at an accessible wavelength for optical pumping.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Optically switched erbium fiber laser using a tunable fiber-Bragg grating

et al. 2010

View full text Add to dashboard Cite

The ability to tune the Bragg wavelength of a fibre-Bragg grating (FBG) in an all-fibre laser can offer added functionality such as laser wavelength tunability, polarization selectivity, 1 and Q-switching. 2 Compared to current techniques which rely on mechanically straining the FBG to achieve Bragg-wavelength tunability, an all-optical technique for tuning an FBG offers potentially faster switching speeds and a more robust and simple cavity. All-optical tuning of the Bragg wavelength of an FBG has been demonstrated previously by resonant optical pumping; however this technique has only been applied to passive systems for switching applications. 3 In this work, we have further investigated this optical-tuning process, experimentally identifying three time-scale regimes, and optimised it for application to active systems. Furthermore, we constructed an erbium all-fibre laser cavity consisting of an outputcoupler FBG and an optically-tunable, high-reflector FBG. The cavity pumping and the optical tuning of the FBG were kept independent. By repetitively tuning the high-reflector FBG on-and off-resonance with the output-coupler FBG, we actively Q-switched the erbium fibre laser at repetition rates up to 35 kHz, limited only by our diode driver. We show that grating tuning at >300 kHz is possible with the existing embodiment, and discuss further potential to operate at MHz rates.

show abstract

All-Fiber ${Q}$-Switched Ring Laser With Increased Repetition Rate

Cited by 8 publications

References 9 publications

PbS Nanoparticles for Ultrashort Pulse Generation in Optical Communication Region

PbS Nanoparticles for Ultrashort Pulse Generation in Optical Communication Region

All-optical, actively Q-switched fiber laser

Optically switched erbium fiber laser using a tunable fiber-Bragg grating

Contact Info

Product

Resources

About