Dr. Roopa Prakash Profile

Dr. Roopa Prakash

Research Scholar at Ctr for Nano Science and Engineering CeNSE

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Author

Publications (13)

Proceedings Article | 5 March 2021 Presentation + Paper

Polarization maintaining, narrow linewidth fiber laser with >1kW output power using a novel dual sine and noise modulation for enhanced SBS suppression

Roopa Prakash, B. S. Vikram, V. R. Supradeepa

Proceedings Volume 11665, 1166507 (2021) https://doi.org/10.1117/12.2583154

KEYWORDS: Modulation, Polarization, Fiber lasers, Phase modulation, Scattering, Laser scattering, Laser damage threshold, Fiber amplifiers, Continuous wave operation, Binary data

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Proceedings Article | 3 March 2020 Presentation + Paper

Continuous linewidth tuning of a laser source from single frequency to over 30GHz using phase modulation amplification using cascaded four-wave mixing

B. Vikram, Roopa Prakash, V. Supradeepa

Proceedings Volume 11276, 112760V (2020) https://doi.org/10.1117/12.2546795

KEYWORDS: Phase modulation, Four wave mixing, Modulators, Fiber amplifiers, Optical amplifiers, Laser sources, Modulation, Temporal coherence

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Proceedings Article | 2 March 2020 Presentation + Paper

High repetition rate sub-picosecond pulse generation through compression of adaptively optimised frequency combs based on phase-modulated continuous wave lasers

B. S. Vikram, Roopa Prakash, Divya Nair, Shankar Kumar Selvaraja, V. R. Supradeepa

Proceedings Volume 11264, 1126406 (2020) https://doi.org/10.1117/12.2546631

KEYWORDS: Frequency combs, Picosecond phenomena, Electro optics, Pulsed laser operation, Modulators, Interferometry, Continuous wave operation, Nonlinear optics, Optical fibers

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Proceedings Article | 2 March 2020 Paper

Enhancement of stimulated Brillouin scattering thresholds of high power narrow-linewidth fiber lasers through a simple line-broadening scheme using a combination of sinusoidal and white noise phase modulation

B. S. Vikram, Roopa Prakash, Santosh Aparanji, V. R. Supradeepa

Proceedings Volume 11264, 112641M (2020) https://doi.org/10.1117/12.2546544

KEYWORDS: Modulation, Phase modulation, Laser scattering, Fiber lasers, Scattering, Optical amplifiers, Fiber amplifiers, Laser damage threshold, Tunable lasers

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Proceedings Article | 7 March 2019 Paper

Continuously linewidth tunable, polarisation maintaining narrow linewidth fiber laser

B. Vikram, Vishal Choudhury, Roopa Prakash, Santosh Aparanji, V. Supradeepa

Proceedings Volume 10897, 108971V (2019) https://doi.org/10.1117/12.2510431

KEYWORDS: Linear filtering, Attenuators, Phase modulation, Polarization, Fiber lasers, Modulators, Ytterbium, Optical amplifiers, Laser scattering, Nonlinear optics

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Proceedings Article | 4 March 2019 Paper

Observation of visible light flashes in high power, near infrared, narrow-linewidth fiber lasers and its potential use as a visual monitor for stimulated Brillouin scattering

Vishal Choudhury, Santosh Aparanji, Roopa Prakash, V. Balaswamy, V. Supradeepa

Proceedings Volume 10903, 109030K (2019) https://doi.org/10.1117/12.2510276

KEYWORDS: Fiber lasers, Visible radiation, Optical amplifiers, Harmonic generation, High harmonic generation

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Proceedings Article | 4 March 2019 Paper

Adaptive pulse shaping for enhanced spectral broadening of high repetition rate, electro-optic frequency combs

B. S. Vikram, Roopa Prakash, Sneha Banerjee, Shankar Kumar Selvaraja, V. Supradeepa

Proceedings Volume 10902, 109020P (2019) https://doi.org/10.1117/12.2510117

KEYWORDS: Frequency combs, Electro optics, Modulators, Modulation, Pulse shaping, Optical fibers, Electrooptic modulators, Optical communications, Adaptive control

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Proceedings Article | 4 March 2019 Presentation + Paper

Demonstration of input wavelength flexible cascaded Raman resonators based on the inclusion of a broadband distributed feedback reflector

Roopa Prakash, V. Balaswamy, Vishal Choudhury, C. Lakshmi, V. Supradeepa

Proceedings Volume 10902, 109021D (2019) https://doi.org/10.1117/12.2509759

KEYWORDS: Reflectors, Resonators, Fiber lasers, Ytterbium, Wavelength division multiplexing, Amplifiers, Optical filters, Optical fibers, Fiber Bragg gratings

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Proceedings Article | 4 March 2019 Presentation + Paper

Experimental analysis of stimulated Brillouin enhancement in high power, line-broadened, narrow-linewidth fiber amplifiers due to spectral overlap between the Brillouin gain spectrum and the signal back-scatter from the fiber termination

V. Balaswamy, Roopa Prakash, Vishal Choudhury, Santosh Aparanji, B. S. Vikram, V. Supradeepa

Proceedings Volume 10902, 109021G (2019) https://doi.org/10.1117/12.2510317

KEYWORDS: Phase modulation, Autoregressive models, Fiber amplifiers, Optical amplifiers, Optical fibers, Backscatter, Rayleigh scattering, Scattering, Reflection, High power fiber amplifiers

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Proceedings Article | 22 February 2018 Presentation + Paper

Low power generation of equalized broadband CW supercontinua using a novel technique incorporating modulation instability of line broadened pump

Roopa Prakash, Vishal Choudhury, S. Arun, V. R. Supradeepa

Proceedings Volume 10528, 1052817 (2018) https://doi.org/10.1117/12.2289495

KEYWORDS: Supercontinuum generation, Fiber lasers, Continuous wave operation, Supercontinuum sources, Nonlinear optics, Imaging spectroscopy

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Proceedings Article | 20 February 2018 Paper

Spectrally resolved, broadband frequency response characterization of photodetectors using continuous-wave supercontinuum sources

Vishal Choudhury, Roopa Prakash, K. P. Nagarjun, V. R. Supradeepa

Proceedings Volume 10513, 105131O (2018) https://doi.org/10.1117/12.2289494

KEYWORDS: Photodetectors, Continuous wave operation, Supercontinuum sources, Calibration, Spectrum analysis, Pulsed laser operation, Light sources, Optical filters, Modulation, Sensors

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Proceedings Article | 15 February 2018 Paper

A versatile, C-band spanning, high repetition rate, cascaded four wave mixing based multi-wavelength source

B. S. Vikram, Roopa Prakash, Nagarjun K. P., Shankar Kumar Selvaraja, V. R. Supradeepa

Proceedings Volume 10516, 105161K (2018) https://doi.org/10.1117/12.2289335

KEYWORDS: Modulators, Four wave mixing, Electrooptic modulators, Microwave radiation, Laser scattering, Optical communications, Dense wavelength division multiplexing, Fiber amplifiers

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Proceedings Article | 29 January 2018 Paper

Frequency offset locked dual-carrier excitation of phase-modulated electro-optic frequency combs for bandwidth scaling and nonlinear spectral broadening

K. P. Nagarjun, B. S. Vikram, Roopa Prakash, S. Suparna, Ajay Singh, Shankar Kumar Selvaraja, V. R. Supradeepa

Proceedings Volume 10561, 1056109 (2018) https://doi.org/10.1117/12.2290148

KEYWORDS: Frequency combs, Modulators, Dense wavelength division multiplexing, Semiconductor lasers, Modulation, Electro optics, Linear filtering, Complex systems, Signal generators, Laser stabilization

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Showing 5 of 13 publications

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