Actively Q-switched Nd:YVO_4 laser using an electro-optic periodically poled lithium niobate crystal as a laser Q-switch

Chen, Y.H.; Huang, Yen-Chieh

doi:10.1364/ol.28.001460

Cited by 53 publications

(23 citation statements)

References 8 publications

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“…By optimizing parameters, a stable LGS Q-switched laser was designed with an 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 (Figure 4). The performance of the pulse laser with 200 kHz repetition rate is comparable to the BBO Q-switched laser with 200 kHz repetition rate and better than the DKDP (10 kHz) [38], LN (7 kHz) [39], and other LGS (30 kHz) [37] Q-switched lasers. Additionally, the observed pulse width of 5.1 ns is also smaller than the narrowest pulse width obtained with DKDP (20 ns) [40], LN (12 ns) [39], and other LGS (7.8 ns) [37] Q-switch lasers.…”

Section: 064 M Laser Generation In 2003mentioning

confidence: 85%

“…The performance of the pulse laser with 200 kHz repetition rate is comparable to the BBO Q-switched laser with 200 kHz repetition rate and better than the DKDP (10 kHz) [38], LN (7 kHz) [39], and other LGS (30 kHz) [37] Q-switched lasers. Additionally, the observed pulse width of 5.1 ns is also smaller than the narrowest pulse width obtained with DKDP (20 ns) [40], LN (12 ns) [39], and other LGS (7.8 ns) [37] Q-switch lasers. This work represents the highest repetition rate observed so far in the LGS Q-switched laser regime with a pulsed laser wavelength ranging from 1.0 to 3.0 m. These results indicate that LGS can be used as a high repetition rate Q-switch and is free of piezoelectric ringing effects at least at a repetition rate of 200 kHz and that it can provide a practical Q-switched laser with a tunable high repetition rate for many applications.…”

Section: 064 M Laser Generation In 2003mentioning

confidence: 85%

See 1 more Smart Citation

Langasite Family Midinfrared Nonlinear Optical Oxide Materials: Structure, Property, and Applications

Lan

Liang

Lin

et al. 2017

International Journal of Optics

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Midinfrared (IR) nonlinear optical (NLO) materials with high performance are vital in important technological applications in many civil and military fields. Very recently, langasite family compounds have attracted much attention due to their wide transparency to mid-IR region and ultrahigh laser damage threshold (LDT). In this brief review, three important compounds-LGS, LGN, and LGT-are investigated and analyzed based on available experimental data. The electrooptical (EO) Q-switch and mid-IR OPO applications are summarized in detail. Finally, promising search directions for new metal oxides that have good mid-IR NLO performances are discussed.

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Section: 064 M Laser Generation In 2003mentioning

confidence: 85%

Section: 064 M Laser Generation In 2003mentioning

confidence: 85%

Langasite Family Midinfrared Nonlinear Optical Oxide Materials: Structure, Property, and Applications

Lan

Liang

Lin

et al. 2017

International Journal of Optics

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“…Light rotates in the same sense during the forward and backward pass in PPLN, and optical rotation accumulates little for the reflected light, not contributing to optical isolation. However, if an additional domain with half the domain thickness is introduced, optical rotation may be achieved [28].…”

Section: Theoretical Analysismentioning

confidence: 99%

Optical isolator based on the electro-optic effect in periodically poled lithium niobate with the addition of a half domain

2012

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We propose an optical isolator based on the electro-optic (EO) effect of periodically poled lithium niobate (PPLN). When the EO effect occurs in PPLN under a TE field, each domain serves as a half-wave plate under the quasi-phase-matching condition, and PPLN shows optical activity similar to quartz. The introduction of an additional half-domain to the normal PPLN changes the incident azimuth angle of the reflected light. As a result, the reflected light does not return to the original polarization state. Thus, the optical rotation accumulates and optical isolation occurs. The isolator can be employed for all linearly polarized light and has the advantage of being used in a weak-light system with low driving voltage and high isolation contrast.

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“…This EO PPLN with folded dielectric axes was usually considered to design devices such as Solc-type filters, [17][18][19] polarization controllers, 20,21 and laser-Q switches. 22,23 Significantly less research has focused on the potential of such structure for slowing light signals. It should be noted that this method simultaneously allows for high speed, low-light intensity, and room-temperature operation.…”

mentioning

confidence: 99%

Active control of group velocity by use of folded dielectric axes structures

Liu

Chen

et al. 2010

Applied Physics Letters

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A method was demonstrated for slowing light signals in electro-optical periodically poled lithium niobate. A forbidden band gap can be formed when the transverse electric field exceeds zero. The group velocity of a light near the band gap can be delayed via changes in electric field strength or wavelength, with a maximum delay of 20 ns in the experiment, which is attractive for electro-optical signal processing and all-optical signal processing.The group velocity modulation of light 1-3 has attracted significant interest recently as a potential solution for optical delay lines and time-domain optical signal processing, 4,5 and the enhancement of nonlinear optical effects 6,7 due to the spatial compression of optical energy. 8,9 However, so far most of these methods bear inherent limitations that may hinder their practical deployment. [10][11][12][13][14][15][16] In this paper, a method was demonstrated to rapidly control the group velocity at the room temperature in electro-optical ͑EO͒ periodically poled lithium niobate ͑PPLN͒, where the group velocity of input optical beam can be modulated from subluminal to superluminal by simply adjusting the applied external electric fields. This EO PPLN with folded dielectric axes was usually considered to design devices such as Solc-type filters, 17-19 polarization controllers, 20,21 and laser-Q switches. 22,23 Significantly less research has focused on the potential of such structure for slowing light signals. It should be noted that this method simultaneously allows for high speed, low-light intensity, and room-temperature operation.In PPLN, transverse dc external electric field can compel the optical axis of positive domains and negative domains to rotate by angles of + and − with respect to the plane of polarization of the input light. 24 The relative azimuth angle between the dielectric axes of two adjacent domains is assumed to be small so that the periodic alternation of the azimuth can be considered as a periodic, small perturbation. In this case, the coupled-wave equations of OW and EW with a periodic small perturbation are given by the following: 24,25and = − 2c n o 2 n e 2 ␥ 51 E y ͱ n o n e i͑1 − cos m͒ m ͑m = 1,3,5. . .͒, ͑3͒where A 1 and A 2 are the normalized amplitudes of OW and EW, respectively, ␤ 1 and ␤ 2 are the corresponding wave vectors, G m is the m th reciprocal-vector corresponding to the periodicity of poling, ⌳ is the period of PPLN, n o and n e are the refractive indices of OW and EW, respectively; ␥ 51 is the EO coefficient and E y is the electric field intensity. Assuming that the initial condition satisfies A 1 ͑0͒ =0, A 2 ͑0͒ = 1, the exact solutions of the coupled-wave equations are given by

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Actively Q-switched Nd:YVO_4 laser using an electro-optic periodically poled lithium niobate crystal as a laser Q-switch

Cited by 53 publications

References 8 publications

Langasite Family Midinfrared Nonlinear Optical Oxide Materials: Structure, Property, and Applications

Langasite Family Midinfrared Nonlinear Optical Oxide Materials: Structure, Property, and Applications

Optical isolator based on the electro-optic effect in periodically poled lithium niobate with the addition of a half domain

Active control of group velocity by use of folded dielectric axes structures

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