Phase and frequency stabilization of a pump laser to a Raman active resonator

Brasseur, J.K.; Teehan, Russell F.; Knize, R. J.; Roos, Peter A.; Carlsten, J. L.

doi:10.1109/3.937397

Cited by 5 publications

(2 citation statements)

References 18 publications

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“…where ξ loss1 and ξ loss2 are defined as the ratio of Stokes wave loss to that of anti-Stokes wave one and of Stokes wave to that of external wave one, respectively, γ q = (c/n q L) R 1q R 2q is the intra-cavity lifetime of photon q-mode or q-mode loss, γ ep = (c/n p L) T 1q is the loss of external field, n q is the refractive index of q-field, ω q is the frequency of q-mode, R is the cavity mirror's reflectance, T is the transmittance, the subscript "1" presents the front mirror that couples the external field, and "2" means back mirror, G(δ) is the Raman gain coefficient, coupling constant corresponding to third-order susceptibility χ (3) of Raman medium [12], δ is the two-photon detuning for 1 → 2 transition (see Fig. 1), C = [(k p + k s )/Σk] sin (∆lL/2/∆kL/2) is the coupling coefficient corresponding to phase mismatch in four wave interaction, Σk = 2k 3into set of equations for intra-cavity powers [12] we obtain the dimensionless equationṡ…”

Section: Dimensionless Rate Equations With Gaussian Pulsementioning

confidence: 99%

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Optimization of Trio-Cavity Raman Laser Pumped by Pulsed Gaussian Beam

Khoa

Lanh

2013

Comm. in Phys.

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Section: Dimensionless Rate Equations With Gaussian Pulsementioning

confidence: 99%

“…Among the last previous works the CW Raman laser is the most interested [1][2][3][4][5][6][7][8][9]. The investigation for Raman lasers operating in pulse regime or pumped by pulse is still too little [10], specially, for Raman laser generating at anti-Stokes wave.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Trio-Cavity Raman Laser Pumped by Pulsed Gaussian Beam

Khoa

Lanh

2013

Comm. in Phys.

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5. The continuous-wave hydrogen raman laser

Roos

Meng

Carlsten

2003

Cavity-Enhanced Spectroscopies

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Single nanoparticle detection using split-mode microcavity Raman lasers

Clements

et al. 2014

Proc. Natl. Acad. Sci. U.S.A.

266

137

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Ultrasensitive nanoparticle detection holds great potential for early-stage diagnosis of human diseases and for environmental monitoring. In this work, we report for the first time, to our knowledge, single nanoparticle detection by monitoring the beat frequency of split-mode Raman lasers in high-Q optical microcavities. We first demonstrate this method by controllably transferring single 50-nm-radius nanoparticles to and from the cavity surface using a fiber taper. We then realize real-time detection of single nanoparticles in an aqueous environment, with a record low detection limit of 20 nm in radius, without using additional techniques for laser noise suppression. Because Raman scattering occurs in most materials under practically any pump wavelength, this Raman laser-based sensing method not only removes the need for doping the microcavity with a gain medium but also loosens the requirement of specific wavelength bands for the pump lasers, thus representing a significant step toward practical microlaser sensors.stimulated Raman scattering | optical microcavity | mode splitting | optical sensor | label free S timulated Raman scattering holds great potential for various photonic applications, such as label-free high-sensitivity biomedical imaging (1) and for extending the wavelength range of existing lasers (2), as well as for generating ultra-short light pulses (3). In high Q microcavities (4), stimulated Raman scattering, also called Raman lasing, has been experimentally demonstrated to possess ultra-low thresholds (5-12), due to the greatly increased light density in microcavities (13). Such microcavity Raman lasers hold great potential for sensing applications. In principle, Raman lasing initially occurs in the two initially degenerate counter propagating traveling cavity modes. These two modes couple to each other due to backscattering when a nanoscale object binds to the cavity surface. For a sufficiently strong coupling, in which the photon exchange rate between the two initial modes becomes larger than the rates of all of the loss mechanisms in the system, two new split cavity modes form (14-18) and lase simultaneously. Thus, by monitoring the beat frequency of the split-mode Raman lasers, ultrasensitive nanoparticle detection can be realized.In this work, we report, to our knowledge, the first experimental demonstration of single nanoparticle detection using split-mode microcavity Raman lasers. The sensing principle is first demonstrated in air, by controllably binding or removing single 50-nm-radius polystyrene (PS) nanoparticles to and from the cavity surface using a fiber taper (19) and measuring the changes in the beat frequency of the two split Raman lasers. Real-time single nanoparticle detection is then performed in an aqueous environment by monitoring the discrete changes in beat frequency of the Raman lasers, and a detection limit of 20 nm in particle radius is realized. This microcavity Raman laser sensing method holds several advantages. On the one hand, the beat frequency of the Raman las...

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Phase and frequency stabilization of a pump laser to a Raman active resonator

Cited by 5 publications

References 18 publications

Optimization of Trio-Cavity Raman Laser Pumped by Pulsed Gaussian Beam

Optimization of Trio-Cavity Raman Laser Pumped by Pulsed Gaussian Beam

5. The continuous-wave hydrogen raman laser

Single nanoparticle detection using split-mode microcavity Raman lasers

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