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The evolution of the nth analytical solutions of commonly used Raman equations, analyzed by numerical simulation and experimentally, is reported. In the experiment, a 1 km undoped single-mode fiber was pumped with an ytterbium doped fiber laser system (FL) in continuous wave regime at 1064 nm in a free running configuration. We showed that it is possible to obtain up to the nth power thresholds and the maximum power for each Stokes wave by using compact analytical solutions as a first approximation in a simple, quick process. #

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“…In the model, the following standard ordinary nonlinear differential coupled set of equations was employed: 4) dP…”

Section: Simulations Resultsmentioning

confidence: 99%

Evolution of the nth Stokes-wave due to stimulated Raman scattering in single-mode fibers

Sanchez-Lara

Cruz-May

Pérez-Sánchez³

et al. 2014

OPT REV

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“…Each intermediate cavity uses a pair of fiber Bragg gratings (FBGs) whereas the half-open uses one. This scheme represents the usual solution for obtaining high-order Stokes signals given the Raman-shifts limitations, 13.2 THz (450 cm −1 ) and 14.1 THz (490 cm −1 ), of silica-based optical fibers [1]. Although functional, this approach represents a lossy cavity given that the introduction of each FBG represents a double-pass insertion loss of more than 1 dB; with such approach the fiber propagating loss together with all the splices connecting everything become negligible compared to the total loss introduced by all the FBGs.…”

Section: Introductionmentioning

confidence: 99%

“…Departing from these facts, in this work we present the results of an alternative that in our opinion simplifies these types of systems. We experimentally probed the following hypotheses: (1) given that the resonant frequencies of most silica molecules inside an optical fiber pumped at around 1064 nm vibrate (at room temperature) around 450 cm −1 (where first Stokes becomes generated) Is it possible to directly convert 1064 nm to the second Stokes component located at around 900 cm −1 without using an intermediate grating-composed first Stokes cavity? and (2) Is it possible to achieve more higher order Stokes without lower Stokes intermediate cavities?…”

Section: Introductionmentioning

confidence: 99%

Second (1178 nm) and third (1242 nm) Stokes Raman fiber lasers without intermediate Stokes cavities

2017

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We report and propose a simple Raman fiber laser scheme that generates two or three order Raman Stokes components by using a single strong (unidirectional) cavity formed by a high-reflecting fiber Bragg grating and air-glass interface (fiber output); the intermediate cavities are non-grating, weak and bi-directional cavities that serve as 'virtual links' or energy reservoirs. Once the strong cavity reaches operation, it practically consumes (converts) all the energy from pump and intermediate components into a single and clamped (unidirectional) signal. For example, the use of second-Stokes fiber Bragg grating together with glass-air output operated and harvested practically all the energy. Analogously, third Stokes emission was obtained by changing the grating and hence relying on first and second non-grating formed intermediate cavities. The system uses commercial silica fiber and minimizes the use of lossy and costly fiber Bragg gratings. This proposal broadens the possibilities for covering the entire 1000-2000 nm window for applications that use silica fibers.

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“…Calculations of the higher-order Stokes generation are carried out based on the coupled equations presented in Refs. [25,26]. Explicitly, these coupled equations read…”

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confidence: 99%

Integrated liquid-core optical fibers for ultra-efficient nonlinear liquid photonics

Kieu

Merzlyak

Schneebeli

et al. 2012

Conference on Lasers and Electro-Optics 2012

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We have developed a novel integrated platform for liquid photonics based on liquid core optical fiber (LCOF). The platform is created by fusion splicing liquid core optical fiber to standard singlemode optical fiber making it fully integrated and practical -a major challenge that has greatly hindered progress in liquid-photonic applications. As an example, we report here the realization of ultralow threshold Raman generation using an integrated CS2 filled LCOF pumped with subnanosecond pulses at 1064nm and 532nm. The measured energy threshold for the Stokes generation is ∼ 1nJ, about three orders of magnitude lower than previously reported values in the literature for hydrogen gas. The integrated LCOF platform opens up new possibilities for ultralow power nonlinear optics such as efficient white light generation for displays, mid-IR generation, slow light generation, parametric amplification, all-optical switching and wavelength conversion using liquids that have orders of magnitude larger optical nonlinearities compared with silica glass. 42.65.Dr,

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Cited by 17 publications

References 16 publications

Evolution of the nth Stokes-wave due to stimulated Raman scattering in single-mode fibers

Evolution of the nth Stokes-wave due to stimulated Raman scattering in single-mode fibers

Second (1178 nm) and third (1242 nm) Stokes Raman fiber lasers without intermediate Stokes cavities

Integrated liquid-core optical fibers for ultra-efficient nonlinear liquid photonics

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