Operation of Rhodamine 6G Dye Laser in Water Solution

Igarashi, Kaoru; Maeda, Mituso; Takao, Takayuki; Uchiumi, Masaharu; Oki, Yuji; Shimamoto, Koujiro

doi:10.1143/jjap.34.3093

Cited by 20 publications

(6 citation statements)

References 3 publications

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“…The enhanced photostability of the dyes in the presence of CB7 in aqueous solution is again related to the encapsulation into the chemically inert, nonpolar, and weakly polarizable cavity of the molecular container, CB7, which additionally suppresses undesirable intermolecular photoreactions, for example, with the solvent and dissolved molecular oxygen. [15][16][17]31] Also noteworthy from a practical point of view is that the addition of CB7 does not lead to any foam or bubble formation, a complication that had been encountered in experiments with surfactants as deaggregating additives, [11,13] compromising a practical applicability of the latter systems.…”

Section: Resultsmentioning

confidence: 99%

“…These particular characteristics were also investigated for the dye-CB7-water vs dyeEtOH systems by using the photothermal deflection method as described elsewhere. [13,32] Typical photothermal deflection signals for the KRS dye in water-CB7 and ethanol media are shown in Figures 4 a,b. On average, the magnitude and the full width at half maximum (FWHM) of the deflection signals were 0.39 V and 120 ms, respectively, in water with CB7 additive, while the corresponding values were 5 V and 710 ms, respectively, in ethanol solution.…”

Section: Resultsmentioning

confidence: 99%

“…Use of organic solvents additionally poses disposal concerns and safety hazards due to the flammable nature of these solvents, which are generally used in large bulk quantities in dye lasers. [11][12][13] Water is the preferred solvent. [10][11][12] Unfortunately, organic dyes form non-fluorescent or weakly fluorescent aggregates in water, [14] which has hitherto rendered laser applications impracticable.…”

Section: Introductionmentioning

confidence: 99%

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Molecular Encapsulation of Fluorescent Dyes Affords Efficient Narrow‐band Dye Laser Operation in Water

et al. 2010

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A water-based narrow-band high-efficiency dye laser was designed by means of a supramolecular host-guest chemical approach. The lasing characteristics of rhodamine B and sulforhodamine B (Kiton Red S) dyes in aqueous solution with the macrocyclic host cucurbit[7]uril (CB7) as additive were investigated in a narrow-band dye laser setup. Significant improvements in both photostability and thermo-optical properties of the aqueous CB7-complexed dye systems were observed as compared to the uncomplexed dyes in ethanol solution. The tuning curves for the new dye-CB7-water systems were constructed by measuring the laser output at different wavelengths, which showed similar peak efficiencies and red-shifted gains compared to the ethanolic solutions of the dyes, while dye laser operation revealed comparable pump threshold energies and slope efficiencies. The combined results render the dye-CB7-water system an attractive active medium for high-repetition rate dye laser operation.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Molecular Encapsulation of Fluorescent Dyes Affords Efficient Narrow‐band Dye Laser Operation in Water

et al. 2010

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“…The reason is attributed to the high concentration of water for the dye solutions, of which the non-radiative dimmers dramatically degrade gain property of Rhodamine 6G [16]. In addition, the tuning of lasing wavelength on this dye laser chip was also demonstrated by changing the grating's periods.…”

Section: R Based On Cirmentioning

confidence: 99%

Optofluidic distributed feedback dye laser via evanescent gain

Song

Vasdekis

2010

Organic Photonic Materials and Devices XII

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We demonstrate optofluidic evanescent dye lasers based on two types of solid distributed feedback (DFB) grating cavities-the first order linear DFB gratings which gives in-plane laser emitting and second order circular DFB gratings which gives surface laser emitting. For both of them, the laser mode is confined within the waveguide and experience optical gain via evanescent wave coupling with the dye solution. Benefitting from the solid waveguide cores, stable and narrow linewidth laser output were observed with a large tolerance of fluid refractive indices, which prove the feasibility of integrating fluid evanescent gain dye laser into passive waveguide circuit.

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“…This is attributed to the high concentration of water in the solution, which has been shown to degrade the gain properties of rhodamine 6G. 19 Finally, we investigated the tuning of the emission wavelength by changing the period of the circular DFB grating. The emission spectra are plotted in Fig.…”

mentioning

confidence: 99%

Optofluidic evanescent dye laser based on a distributed feedback circular grating

Song

Vasdekis

et al. 2009

Applied Physics Letters

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We demonstrate an optofluidic evanescent laser based on a solid circular distributed feedback grating with the dye solution acting as the cladding layer. The laser mode is confined within the grating and experiences optical gain via the interaction between its evanescent component with the dye solution. Above a pump energy of 9.5 J / pulse, the laser exhibited single mode operation at 571 nm. Stable, narrow-linewidth emission was observed for a wide range of fluid refractive indices, even for those lower than of polydimethylsiloxane. We attribute this property to the evanescent coupling of the laser mode with the fluidic gain. 8 In all aforementioned structures, the guided mode is confined inside the fluid gain medium and thus the refractive index of the solution determines the emission wavelength. Although this enables the tuning of the lasing wavelength by fluidic mixing, in practice stable and single mode operation require high control of the refractive index of the fluid and moderate flow rates across the waveguides. In addition, due to the relatively high index of polydimethylsiloxane ͑PDMS͒ ͑n PDMS = 1.4218͒, several buffers cannot be directly employed for waveguiding in PDMS based optofluidic lasers.To overcome this, evanescent field dye lasers have been proposed in the past.9,10 In these lasers, the liquid gain medium surrounds a solid waveguide and is optically excited. The excited chromophores in the near-field of the waveguide are evanescently coupled to the laser mode providing the optical gain. To date, several evanescent optofluidic dye lasers have been demonstrated, primarily based on whispering gallery mode resonators such as infilled silica capillaries or fibers embedded in dye solutions.11-13 These structures are usually characterized by multimode emission spectra. More recently, evanescent lasers operating in the telecommunication wavelength range have found applications in the field of silicon photonics.14 In this letter, we demonstrate an optofluidic evanescent dye laser, exhibiting single mode operation. It comprises of a solid second order circular distributed feedback ͑DFB͒ grating and a PDMS chamber filled with dye solution. The thin layer of the solution serves as the cladding and covers the entire surface of the solid DFB cavity. Due to the high modal confinement in the solid core, the mode selection and lasing wavelength are primarily determined by the solid DFB cavity. In comparison to liquid core dye lasers, 7 stable and single mode operation can be achieved for a wide range of refractive indices of the dye solution.In Fig. 1, a cross-sectional schematic of the circular DFB resonator is illustrated. It is made of the negative photoresist SU-8 ͑refractive index n SU-8 = 1.59͒ patterned on top of silicon dioxide layer ͑n SiO 2 = 1.46͒ on a silicon substrate. The PDMS ͑n PDMS = 1.4128͒ forms a microfluidic chamber which envelops the entire surface of the solid DFB cavity. By infilling the dye solution into the PDMS chamber, a thin layer of liquid gain medium is formed on top of the gra...

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Operation of Rhodamine 6G Dye Laser in Water Solution

Cited by 20 publications

References 3 publications

Molecular Encapsulation of Fluorescent Dyes Affords Efficient Narrow‐band Dye Laser Operation in Water

Molecular Encapsulation of Fluorescent Dyes Affords Efficient Narrow‐band Dye Laser Operation in Water

Optofluidic distributed feedback dye laser via evanescent gain

Optofluidic evanescent dye laser based on a distributed feedback circular grating

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