Yb band parasitic lasing suppression in Er/Yb-co-doped pulsed fiber amplifier based on all-solid photonic bandgap fiber

Ouyang, Deqin; Guo, Chunyu; Ruan, Shuangchen; Yan, Peiguang; Wei, Huifeng; Luo, Jie

doi:10.1007/s00340-013-5564-5

Cited by 11 publications

(3 citation statements)

References 16 publications

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“…We name this problem optical feedback inhibition (OFI), and it may be similar to parasitic lasing (PL) also resulting from back reflection. Although parasitic lasing mostly occurs in high power or Q-switched high gain laser system, like slab laser, thin-disk laser or fiber amplifier, [13][14][15][16][17][18] and can make optical damage with spectrally bright and small spatial divergent beam, to date, no direct evidence has indicated that OFI can make optical damage and we have not observed the temporal spikes with InGaAs detector either. We still speculate that the OFI problem is one type of PL, dissimilar to an amplified spontaneous emission (ASE), with two basic phenomena: the backward spectrum is sharp and the gain is clamped around 1987 nm.…”

Section: Introductionmentioning

confidence: 64%

Analysis of gain distribution in cladding-pumped thulium-doped fiber laser and optical feedback inhibition problem in fiber-bulk laser system

Ji¹,

Liu²,

Hu³

et al. 2015

Chinese Phys. B

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The steady-state gain distribution in cladding pumped thulium-doped fiber laser (TDFL) is analytically and numerically solved based on the rate equations including loss coefficients and cross relaxation effect. With the gain curve, a problem, which is named optical feedback inhibition (OFI) and always occurs in tandem TDFL-Ho:YAG laser system, is analyzed quantitatively. The actual characteristics of output spectra and power basically prove the conclusion of theoretical analysis. Then a simple mirror-deflected L-shaped cavity is employed to restrain the external feedback and simplify the structure of fiber-bulk Ho:YAG laser. Finally, 25 W of 2097-nm laser power and 51.2% of optical-to-optical conversion efficiency are obtained, and the beam quality factor is less than 1.43 obtained by knife-edge method.

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Section: Introductionmentioning

confidence: 64%

Analysis of gain distribution in cladding-pumped thulium-doped fiber laser and optical feedback inhibition problem in fiber-bulk laser system

Ji¹,

Liu²,

Hu³

et al. 2015

Chinese Phys. B

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“…The output power is measured by an optical power meter (OPM). The pigtail fiber of the amplifier is a kind of all-solid photonic bandgap fiber for Yb band parasitic lasing suppression in Er/Yb co-doped fiber amplifier with a mode field diameter (MFD) of 10.9 µm at the wavelength of 1550 nm [33].…”

Section: Experimental Setup and Fiber Characteristicsmentioning

confidence: 99%

Optimized flat supercontinuum generation in high nonlinear fibers pumped by a nanosecond Er/Yb Co-doped fiber amplifier

et al. 2014

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Flat supercontinuum generation has been demonstrated in high nonlinear fibers with zero dispersion wavelengths at 1480 and 1500 nm, which were pumped by a MOPA structured Er/Yb co-doped fiber amplifier based on a modulated nanosecond seed laser with the wavelength of 1552 nm. The spectra and output powers affected by the zero dispersion wavelengths, fiber lengths and pump pulse widths were investigated experimentally. A flat spectrum with 5 dB bandwidth from 1220 nm to beyond 1700 nm (assuming the pump peak was filtered) in the optical spectrum analyzer detectable range was finally obtained by optimizing the fiber length and pump pulse width. The maximum output power was 1.02 W, including the peaks near 1550 nm.

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“…Instead of passively filtering the Yb-ASE either with specially designed long-period fiber gratings [4] or band-gap photonic crystal fibers [5,6], the strong Yb-ASE can be actively reused to improve the efficiency of an EYDFA [7][8][9][10]. In our previous works [7][8][9], we revealed through numerical investigation that in a high-power pumped EYDFA the counter-pump-propagating Yb-ASE is dominant.…”

Section: Introductionmentioning

confidence: 99%

Highly efficient Er–Yb codoped double-clad fiber amplifier with an Yb-band resonant cavity

et al. 2017

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A high-power Er-Yb codoped fiber amplifier (EYDFA) with an Yb-band resonant cavity is investigated. By introducing a linear resonant cavity formed by a pair of high-reflection double-clad fiber Bragg gratings, the Yb-ASE problem of high-power pumped EYDFAs can be resolved and the efficiency of the amplifier can be notably improved. At a pump power of ~17 W, an output power of 7.25 W was experimentally achieved. The pump conversion efficiency and slope efficiency relative to the applied pump power are ~42.6% and ~45.6%, respectively. Moreover, due to the gain-clamping effect of the Yb cavity, the gain flatness of the amplifier is also evidently improved.

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Yb band parasitic lasing suppression in Er/Yb-co-doped pulsed fiber amplifier based on all-solid photonic bandgap fiber

Cited by 11 publications

References 16 publications

Analysis of gain distribution in cladding-pumped thulium-doped fiber laser and optical feedback inhibition problem in fiber-bulk laser system

Analysis of gain distribution in cladding-pumped thulium-doped fiber laser and optical feedback inhibition problem in fiber-bulk laser system

Optimized flat supercontinuum generation in high nonlinear fibers pumped by a nanosecond Er/Yb Co-doped fiber amplifier

Highly efficient Er–Yb codoped double-clad fiber amplifier with an Yb-band resonant cavity

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