Ultrabroad-band Raman amplifiers pumped and gain-equalized by wavelength-division-multiplexed high-power laser diodes

Namiki, Shu; Emori, Yoshihiro

doi:10.1109/2944.924003

Cited by 317 publications

(108 citation statements)

References 40 publications

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“…7 are 0.29 dB and 0.37 dB for Curves a and c, respectively. These values compare well to reported results using a larger number of pumps but no GEF (Namiki et al, 2001;Giltrelli et al, 2004;Cui et al, 2004). The NF curve in Fig.…”

Section: Small Signal and Saturation Regimes With A Gefsupporting

confidence: 81%

Dual-Wavelength Pumped Dispersion-Compensating Fibre Raman Amplifiers

Brückmann¹,

Boyen²,

Urquhart³

et al. 2011

Advances in Optical Amplifiers

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Section: Small Signal and Saturation Regimes With A Gefsupporting

confidence: 81%

Dual-Wavelength Pumped Dispersion-Compensating Fibre Raman Amplifiers

Brückmann¹,

Boyen²,

Urquhart³

et al. 2011

Advances in Optical Amplifiers

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“…However, despite these attractions, power-scaling of diode-pumped FRLs has been held back by the high pump densities and low fiber propagation losses that are needed to reach laser threshold, since stimulated Raman scattering (SRS) is a weak process. Diode-pumping has been restricted to single-mode devices operating at around 1.5 µm [12]. These benefit from the high brightness of single-mode laser diodes and low fiber loss.…”

Section: Introductionmentioning

confidence: 99%

High-Power Continuous-Wave Directly-Diode-Pumped Fiber Raman Lasers

et al. 2015

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We describe novel fiber Raman lasers pumped directly by spectrally combined high power multimode laser diodes at ∼975 nm and emitting at ∼1019 nm. With a commercial multimode graded-index fiber, we reached 20 W of laser output power with a record slope efficiency of 80%. With an in-house double-clad fiber, the beam quality improved to M 2 = 1.9, albeit with lower output power and slope efficiency due to higher fiber loss. We believe this is the first publication of a fiber Raman laser cladding-pumped directly by diodes.

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“…The OCT images were obtained using the novel broadband wavelengthswept Raman laser source. the order of several femto-seconds for silica [9]. It is expected that the application of a fiber Raman amplifier can be extended to biomedical imaging based on these experimental results due to the increasing demand for higher-speed and a wider-gain band for the real time and high resolution OCT imaging, respectively.…”

Section: Introductionmentioning

confidence: 98%

“…This is the first experimental demonstration of a broadband SS-OCT based on a fiber Raman amplifier as a broad gain medium over 50 nm, compared with the previous report of narrower Raman gain using a single-wavelength optical pumping scheme [6,7]. As high power optical pump sources have become commercially available, a fiber Raman amplification based on stimulated Raman scattering in silica optical fibers has been studied widely, particularly in wavelength-division-multiplexed (WDM) telecommunication system applications [8][9][10][11][12][13]. The fiber Raman amplifier has several advantages, such as low noise, arbitrary gain band determined on the band of the optical pump sources, high temperature stability and instantaneous carrier relaxation times of A novel broadband wavelength-swept Raman laser was used to implement Fourier-domain mode locked (FDML) swept-source optical coherence tomography (SS-OCT).…”

Section: Introductionmentioning

confidence: 99%