High-repetition-rate high-power variable-bandwidth dye laser

Lavi, S.; Amit, Moran; Bialolanker, Gabriel; Miron, E.; Levin, Liron

doi:10.1364/ao.24.001905

Cited by 22 publications

(4 citation statements)

References 9 publications

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“…It is well known that restriction of the flow area using convex-convex, convex-plane or plane-plane surfaces results in an increase in flow velocity [8][9][10][11][12][13][14][15][16][17][18][19][20]. A well known consequence of Bernoulli's equation is that, for a given pressure, reduction in the cross sectional area of the flow channel results in higher flow velocities.…”

Section: Dye Cell Geometries and Flow Analysismentioning

confidence: 99%

“…Several dye cell geometries such as converging, diverging, straight, trapezoidal, parallelogram, rectangular and cellular with convex inner surfaces have been extensively used to achieve high flow velocities in the dye active region [8][9][10][11][12][13][14][15][16][17][18][19][20][21]. Roncin and Damay have designed a demountable trapezoidal dye cell to avoid parasitic oscillation [19].…”

Section: Introductionmentioning

confidence: 99%

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Design of the dye cell of a dye laser to facilitate repetitive operation in the single longitudinal mode

et al. 2013

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A dye cell was designed and fabricated to facilitate high repetition rate single longitudinal mode (SLM) operation with low viscosity solvents such as ethanol. The flow circulation (vortex) in the dye cell was eliminated by reducing the flow cross section from 10 to 5 mm 2 with optimized flow entry. The physical dimension of dye cell is very important for short cavity SLM lasers in terms of keeping the cavity length small. Flow visualization of various geometries in the dye cell was carried out using commercial computational fluid dynamics (CFD) software. It was found that the slit as well as tubular entry to the dye cell of cross section 1 × 10 mm 2 shows flow circulation (a vortex) near the entry to the dye cell. The SLM was obtained from a 10 mm 2 flow cross section dye cell with a high viscosity solvent such as binary solvent (200 cP) or glycerol (1400 cP) with a higher bandwidth. The pulse to pulse fluctuations in the bandwidth and wavelength are generally associated with dye flow instabilities. These flow related instabilities reduced with higher viscosity solvents, which results in an increased bandwidth of the SLM dye laser (by nearly 40%). A specially designed dye cell was fabricated and used for SLM operation at two different pump lasers having different pulse repetition rates ranging from 20 to 6000 Hz. SLM operation was demonstrated for longitudinal pumping of the dye cell with low viscosity solvents. Time averaged SLM line widths of 400 and 175 MHz were obtained with a copper vapor laser (CVL) and Nd:YAG laser, respectively. A single pulse line width of 315 MHz was obtained with a CVL pumped dye laser.

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Section: Dye Cell Geometries and Flow Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design of the dye cell of a dye laser to facilitate repetitive operation in the single longitudinal mode

et al. 2013

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“…Duarte performances, pumped by a high repetition frequency (8-13 kHz) CVL, using trapezoidal cross-section dye cell of dimensions 11 × 1 mm. Lavi et al 14 had designed the dye cell (10 × 0.1 mm) and studied the pulse to pulse mode structure fluctuations of a CVL (at 4 kHz) pumped dye laser. Amit et al 7 had investigated the temperature gradients generated by a high frequency repetitive (4 kHz) CVL in a planar dye cell (gap, 0.5 mm), through the angular deflection and spreading of a probing He-Ne laser beam.…”

Section: Introductionmentioning

confidence: 99%

Design, modeling, and performance evaluation of a novel dye cell for a high repetition rate dye laser

Singh

Patel

Dixit

et al. 2012

Review of Scientific Instruments

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In this paper, a new dye cell for transverse pumping was designed, modeled, and its performance in a narrow spectral width dispersive resonator, pumped by a high repetition rate copper vapor laser, was investigated. The scheme essentially involves the profiling of the cubical glass and stainless steel cylindrical surface such that convex-plano contour be present near the optical pumping region. The design is an amalgamation of straight and curved periphery to enhance the dye solution flow stabilities near the dye laser axis. A computational fluid dynamics analysis of the liquid flow through this dye cell has been carried out. The dye laser outputs such as optical average power, spectral width and wavelength stability, tuning range, pulse shape, through this new dye cell was evaluated. The dye laser average power about 30 mW was fairly steady over the observation period of more than an hour. The dye laser short-term (1 min) spectral width was within 0.824 ± 0.075 GHz, while, in a long-term, more than an hour, drifted by about 180 MHz. The dye laser wavelength in short-term fluctuates within ±0.0065 nm whereas in a long-term, more than an hour, drifted by about 0.0105 nm. The dye laser tuning range was 10 nm with a sub GHz spectral width operation. The pulse shape of the dye laser follows the pump laser pulse profile. Thus, the dye laser has demonstrated fairly long-term stability, without the use of either low expansion material or close loop control on the output.

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“…It is clear that the flow of the dye solution through the dye laser axis has a strong influence on the stability of the dye laser characteristics, which in turn depends on the geometry of the flow channel. A number of types of dye cells have been reported in the literatures for high repetition rate pulsed dye lasers [6][7][8][9][10]. Many of these have specific experimental objectives in mind or offer specific advantages.…”

Section: Introductionmentioning

confidence: 99%

Fluctuations in near 360° curved and straight channel dye cells for high repetition rate copper vapour laser pumped dye laser

Singh¹

2006

J. Phys. D: Appl. Phys.

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A study of wavelength and bandwidth fluctuations of a rhodamine 6G dye laser, transversely pumped by high repetition rate copper vapour laser, using a near 360 • curved and a straight duct dye cell, is presented. The axial modes, which are indistinguishable in the straight duct cell, are clearly distinguishable in the curved duct cell dye laser. The curved duct dye cell has smaller fluctuations in wavelength and bandwidth as compared with the straight dye cell.

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High-repetition-rate high-power variable-bandwidth dye laser

Cited by 22 publications

References 9 publications

Design of the dye cell of a dye laser to facilitate repetitive operation in the single longitudinal mode

Design of the dye cell of a dye laser to facilitate repetitive operation in the single longitudinal mode

Design, modeling, and performance evaluation of a novel dye cell for a high repetition rate dye laser

Fluctuations in near 360° curved and straight channel dye cells for high repetition rate copper vapour laser pumped dye laser

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