Comparison of electro-optical and acousto-optical Q-switched, high repetition rate Nd:GdVO4 laser

Yu, Xin; Wang, C.; Chen, F.; Yan, Renpeng; F., Y.; Li, Xiaodong; Peng, Jiangbo

doi:10.1134/s1054660x11050331

Cited by 16 publications

(8 citation statements)

References 20 publications

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“…Common active Q-switching technologies include acousto-optic (AO) Q-switching and electro-optic (EO) Q-switching, 15 the latter of which has the advantages of short switching time (10−9 s), low loss, and larger extinction ratio 16 . The pulse width of EO Q-switched laser is much shorter than that of AO Q-switched laser 17 . Therefore, EO Q-switching has become a favorable technique in high-repetition-rate and narrow-pulse-width pulsed lasers.…”

Section: Introductionmentioning

confidence: 99%

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Compact and highly stable electro-optic Q-switched laser at 1064 nm based on a composite YAG/Nd:YAG crystal

et al. 2023

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We report a compact and highly stable 1064-nm electro-optic Q-switched laser operating at the repetition rate of 1 kHz. A composite Nd:YAG crystal was used as the gain media and the cavity length was 105 mm. Under the average pump power of 11 W, the output power achieved 2.404 W with the pulse width of 4.558 ns, corresponding to the maximum peak power of 0.527 MW and the optical-to-optical conversion efficiency of 21.85%. The slope efficiency reached 42.69%. The beam quality in the horizontal (M 2x ) and vertical (M 2 y ) directions were 1.81 and 1.58, respectively. The pulse timing jitter was less than 1 ns, and the average power fluctuation measured within 30 min was 0.83% (RMS). It is believed that such a compact and highly stable pulsed laser with high repetition rate, high peak power, and good beam quality has great potential in the fields of lidar, etc.

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Section: Introductionmentioning

confidence: 99%

“…16 The pulse width of EO Q-switched laser is much shorter than that of AO Q-switched laser. 17 Therefore, EO Q-switching has become a favorable technique in high-repetition-rate and narrow-pulse-width pulsed lasers.…”

Section: Introductionmentioning

confidence: 99%

Compact and highly stable electro-optic Q-switched laser at 1064 nm based on a composite YAG/Nd:YAG crystal

et al. 2023

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“…It can be used for all optical clock recovery [1,2], or to imprint the data bits for NRZ to RZ format conversion [3]. Three methods are commonly used for generating the short optical pulses: Q switching [4,5], mode locking [6,7], and gain switching [8][9][10][11]. Both Q switching and mode locking techniques must be added some addi tional acousto optic (AO) or electro optic (EO), or active crystal [12,13], or doped fiber [9] materials in the internal cavity and physical device in the external cavity.…”

Section: Introductionmentioning

confidence: 99%

Characterization of 1550 nm sub-picoseconds optical pulse using a gain-switching distributed feedback laser with CW-mode external-injection and pulse-mode self-injection

Lin

Yang

2011

Laser Phys.

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In this paper, we experimentally demonstrated the 1550 nm short optical pulses generation using a TO packaged gain switching distributed feedback (DFB) semiconductor laser driving by 2.5 GHz radio frequency (RF) signals and combining with optical injection techniques. The characteristics of the generated optical pulse by the proposed CW mode external injection and pulse mode self injection schemes are char acterized in the side mode suppression ratio (SMSR), spectrum line width, pulse width and root mean square (RMS) jitter. In the CW mode external injection case, the SMSR of 35.5 dB, line width of 0.235 nm, pulse width of 47.69 ps, and RMS jitter of 1.4 ps are obtained when the optical injection ratio of 5 dB. In the pulse mode self injection, however, the SMSR of 61.2 dB, spectrum line width of 0.189 nm, pulse width of 58.46 ps, and RMS jitter of 1 ps are achieved and its overall performances are better than CW mode external injection one.

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“…However, up to now the ideal electro-optic crystals have not been found, although many electro-optic crystals have been developed. The most widely used electro-optic crystals comprise KD 2 PO 4 (KD * P), LiNbO 3 (LN), β-BaB 2 O 4 (BBO) and Rb 6 TiOPO 4 (RTP) 12 which nevertheless have some intrinsic problems, such the deliquescence of KD * P, relatively low optical damage threshold of LN (100 MW/cm 2 ) 13 , the low-symmetry structure and natural birefringence of RTP 14 and the difficulty of achieving large-size crystal growth of BBO 15 . Besides, high repetition rate pulsed output is constrained by the piezoelectric ring effect 16 17 , e.g.…”

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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Comparison of electro-optical and acousto-optical Q-switched, high repetition rate Nd:GdVO4 laser

Cited by 16 publications

References 20 publications

Compact and highly stable electro-optic Q-switched laser at 1064 nm based on a composite YAG/Nd:YAG crystal

Compact and highly stable electro-optic Q-switched laser at 1064 nm based on a composite YAG/Nd:YAG crystal

Characterization of 1550 nm sub-picoseconds optical pulse using a gain-switching distributed feedback laser with CW-mode external-injection and pulse-mode self-injection

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

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