Depolarization loss compensated resonator for electro-optic Q-switched solid-state laser

Ji, Jianghua; Zhu, Xiaolei; Dai, Shutao; Wang, Chunyu

doi:10.1016/j.optcom.2006.08.050

Cited by 11 publications

(3 citation statements)

References 9 publications

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“…Previously, Qamar et al [9] and Tang et al [10] explore the principles and performance of these techniques, highlighting their advantages and limitations. Previously, the generation of Q-switched pulses relied on active methods like AOMs [11,12] or EOMs [13,14]. However, these approaches face limitations due to their bulky nature, complex operation, and costly fabrication processes [15,16].…”

Section: Introductionmentioning

confidence: 99%

Q-switched pulse generation in L-band region with polyacrylonitrile saturable absorber

Ahmad,

Salam,

Mokhtar

et al. 2024

Phys. Scr.

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In this study, we assess the practicality of using Polyacrylonitrile (PAN) as a saturable absorber (SA) to generate Q-switched pulses in an erbium-doped fibre laser (EDFL) cavity. A successful combination of PAN, a resin material, and polyvinyl alcohol (PVA) resulted in the formation of a SA film. This film was utilised to generate stable Q-switched pulses operating in a long-wavelength band of 1572 nm. The greatest repetition rate achieved was 66.1 kHz, while the minimum pulse width was 2.43 µs. The maximum pulse energy was achieved at 52 nJ and measured at a pump power of 175.9 mW. To the best of our knowledge, this study is the first report of EDFL passive Q-switching employing a PAN absorber.

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Section: Introductionmentioning

confidence: 99%

Q-switched pulse generation in L-band region with polyacrylonitrile saturable absorber

Ahmad,

Salam,

Mokhtar

et al. 2024

Phys. Scr.

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“…Compared with passive Q-switching, active Q-switching exhibits a stable pulse energy and low temporal jitter at the repetition rate 7 . Active Q-switching mainly utilizes two common Q-switch modes, the acousto-optic (AO) 8 9 and the electro-optic (EO) Q-switching 10 . The AO Q-switching is limited for applications to many fields with high repetition rates because of its tendency to produce a long pulse 7 .…”

mentioning

confidence: 99%

Efficient high repetition rate electro-optic Q-switched laser with an optically active langasite crystal

Zhang

et al. 2016

Sci Rep

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With an optically active langasite (LGS) crystal as the electro-optic Q-switch, we demonstrate an efficient Q-switched laser with a repetition rate of 200 kHz. Based on the theoretical analysis of the interaction between optical activity and electro-optic property, the optical activity of the crystal has no influence on the birefringence during Q-switching if the quarter wave plate used was rotated to align with the polarization direction. With a Nd:LuVO4 crystal possessing a large emission cross-section and a short fluorescence lifetime as the gain medium, a stable LGS Q-switched laser was designed with average output power of 4.39 W, corresponding to a slope efficiency of 29.4% and with a minimum pulse width of 5.1 ns. This work represents the highest repetition rate achieved so far in a LGS Q-switched laser and it can provide a practical Q-switched laser with a tunable high repetition rates for many applications, such as materials processing, laser ranging, medicine, military applications, biomacromolecule materials, remote sensing, etc.

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“…The electro-optic switches with shorter switching time and faster switching speed are quite appealing for signal processing in optical system [1][2][3][4] . Continuous improvement of electro-optic switches plays a very crucial role in the transmission performance of optical communication systems.…”

mentioning

confidence: 99%

Analysis of electro-optic switches with series-coupled multiple microring resonators

Yan

Zheng

et al. 2009

Optoelectron. Lett.

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In terms of the coupled mode theory, microring resonance and electro-optic modulation princeple, a reasonable project is proposed for designing an electro-optic switch with the series-coupled multiple microring resonators. The simulation and optimization are performed at the resonant wavelength of 1550 nm. The results are as follows: the core size of the microring is 1.6 m×1.6 m, the confined layer between the core and the electrode is 1.6 m, the thickness of the electrode is 0.15 m, the radius of the microring is 15.2 m, the coupling gap between the microring and the channel is 0.14 m, and the one between the microring and the microring is 0.6 m, microring number M is 4, the switching voltage is 4 V, the insertion loss is 5.4 dB, and the crosstalk is -20 dB. The output spectrum is much flatter and much steeper than that of the single microring.A key issue in the evolution of optical communication networks is the availability of flexible photonic modules to manage a variety of operations, such as signal routing, wavelength demultiplexing and switching. The electro-optic switches with shorter switching time and faster switching speed are quite appealing for signal processing in optical system [1][2][3][4] . Continuous improvement of electro-optic switches plays a very crucial role in the transmission performance of optical communication systems. In particular, the reasonable selection of electro-optic materials is one of the efficient ways to improve the performance of electro-optic switches.In the last decade, microring resonators (MRRs) have received considerable attention because of their some excellent features, such as low insertion loss, small crosstalk and easy integration of fabrication. In practical applications, the MRR filters should have the so-called box-like spectral response to reduce the need for accurate wavelength control [5] . In order to improve the Lorentzian spectral response and reduce the switching voltage of a single MRR, we can cascade multiple microrings serially to form an electro-optic series coupled MRR array.

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Depolarization loss compensated resonator for electro-optic Q-switched solid-state laser

Cited by 11 publications

References 9 publications

Q-switched pulse generation in L-band region with polyacrylonitrile saturable absorber

Q-switched pulse generation in L-band region with polyacrylonitrile saturable absorber

Efficient high repetition rate electro-optic Q-switched laser with an optically active langasite crystal

Analysis of electro-optic switches with series-coupled multiple microring resonators

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