High power, grating-free, cascaded Raman fiber lasers

Arun, S.; Balaswamy, V.; Aparanji, Santosh; Supradeepa, V. R.

doi:10.1109/cleoe-eqec.2017.8087004

Cited by 8 publications

(8 citation statements)

References 6 publications

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“…For high power near 1310nm, we have utilized a recently developed, Ytterbium fiber laser pumped, grating-free, cascaded Raman laser based on distributed feedback [14][15][16][17][18]. The pump wavelength (which is the emission wavelength of Yb laser) in the normal dispersion region undergoes a series of cascaded Raman shifts in the telecom fiber, to longer wavelengths beyond 1.3micron, thereby transferring the power to anomalous dispersion region.…”

Section: Methodsmentioning

confidence: 99%

“…This enhances the conversion efficiency and stability [14]. We have used a Raman conversion module based on distributed feedback technique [15,16] that can provide grating free, wavelength independent feedback [17,18]. Similar pumping schemes for supercontinuum sources were used earlier with HNLF based supercontinuum in which, cascaded Raman conversions were done till 1.5um, but in a singlepass without the use of feedback enhancement [10].…”

Section: Methodsmentioning

confidence: 99%

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High power, high efficiency, continuous-wave supercontinuum generation using standard telecom fibers

Arun¹,

Choudhury²,

Balaswamy³

et al. 2018

Opt. Express

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Abstract:We demonstrate a simple module for octave spanning continuous-wave supercontinuum generation using standard telecom fiber. This module can accept any high power Ytterbium-doped fiber laser as input. The input light is transferred into the anomalous dispersion region of the telecom fiber through a cascade of Raman shifts. A recently proposed Raman laser architecture with distributed feedback efficiently performs these Raman conversions. A spectrum spanning over 1000nm(>1 octave) from 880-1900nm is demonstrated. The average power from the supercontinuum is ~34W with a high conversion efficiency of 44%. Input wavelength agility is demonstrated with similar supercontinua over a wide input wavelength range. References and links

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

High power, high efficiency, continuous-wave supercontinuum generation using standard telecom fibers

Arun¹,

Choudhury²,

Balaswamy³

et al. 2018

Opt. Express

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“…The Raman filter fiber used has an intrinsic cutoff at 1500 nm and ensures the termination of the cascaded Raman conversion. The concept of distributed Raman feedback was recently used to eliminate gratings in Raman lasers and this approach is adopted here by the use of the feedback coupler in this architecture 5,6 . In this architecture, the feedback coupler serves to provide the seeding for all the intermediate Stokes so as to make the process of stimulated Raman scattering in the forward direction highly efficient.…”

Section: Methodsmentioning

confidence: 99%

Raman based power combining and wavelength conversion of high power ytterbium fiber lasers

Aparanji

Balaswamy

Arun

et al. 2018

Fiber Lasers XV: Technology and Systems

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In this work, we demonstrate an architecture to perform Raman-based power combining and simultaneous wavelength conversion of two independently controlled high-power Ytterbium doped fiber lasers operating at different wavelengths into a single laser line at the 1.5-micron band. Specifically, we have been able to achieve an in-band output power of ~99W with a conversion of ~64% of the quantum limited efficiency. This power combining is illustrated for different cases of the input wavelengths of the Ytterbium fiber laser. In each case, we have been able to demonstrate a power combining of >87 W in the final 1.5-micron band, with more than 85% of the fraction of the power residing in the final desired band.

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“…This also increases the efficiency of Raman conversions. We had demonstrated wavelength tunable Raman fiber lasers that do not use any wavelength selective components like grating pairs and also provide a wavelength independent feedback for all the Raman conversions [13][14].…”

Section: Raman Fiber Lasersmentioning

confidence: 99%

Tunable, CW visible laser sources by frequency doubling of broadly tunable Raman fiber lasers

Arun

Gehlot

Aparanji

et al. 2020

Nonlinear Frequency Generation and Conversion: Materials and Devices XIX

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We have demonstrated a simple technique to make continuous wave (CW), tunable visible lasers. In this experiment, the output from a CW, tunable Raman fiber laser (RFL) is frequency doubled using LBO crystal in a single pass configuration. By tuning the output wavelength of RFL from 1.1-1.3um visible light in green to red wavelengths are generated. The efficiency and output power can be substantially improved by placing the crystal within a resonator cavity and pumping using a polarized RFL with narrower linewidth. Also, by tuning the operating wavelength of Yb laser (1060-1100 nm) broadband visible wavelength tunability can be achieved.

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High power, grating-free, cascaded Raman fiber lasers

Cited by 8 publications

References 6 publications

High power, high efficiency, continuous-wave supercontinuum generation using standard telecom fibers

High power, high efficiency, continuous-wave supercontinuum generation using standard telecom fibers

Raman based power combining and wavelength conversion of high power ytterbium fiber lasers

Tunable, CW visible laser sources by frequency doubling of broadly tunable Raman fiber lasers

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