共查询到10条相似文献,搜索用时 93 毫秒
1.
15波长输出的布里渊掺铒光纤激光器 总被引:8,自引:3,他引:5
多波长布里渊掺铒光纤激光器是一种新型的多波长光纤激光器,其原理是利用受激布里渊增益和掺铒光纤的线性增益,可以在常温下得到波长间隔约为0.08nm(~10GHz)的多波长输出。报道的布里渊掺铒光纤激光器,在布里渊抽运功率为1.7mW、980nm抽运功率为300mW的情况下得到稳定的15个波长(间隔~10GHz)的输出,这种激光器用作光传感器、光谱分析仪以及密集波分复用系统的光源。实验发现,输出波长的个数随着980nm抽运功率的增大而增加。另外,布里渊掺铒光纤激光器的信号功率主要来自于掺铒光纤的增益,而布里渊增益对它的影响不大。 相似文献
2.
Baozhen Zhao Yuxin Leng Cheng Wang Yongliang Jiang Juan Du Zhizhan Xu 《Optics Communications》2006,259(1):137-141
Optical parametric chirped pulse amplification with different pump wavelengths was investigated using LBO crystal, at signal central wavelength of 800 nm. According to our theoretical simulation, when pump wavelength is 492.5 nm, there is a maximal gain bandwidth of 190 nm centered at 805 nm in optimal noncollinear angle using LBO. Presently, pump wavelength of 492.5 nm can be obtained from second harmonic generation of a Yb:Sr5(PO4)3F laser. The broad gain bandwidth can completely support ∼6 fs with a spectral centre of seed pulse at 800 nm. The deviation from optimal noncollinear angle can be compensated by accurately tuning crystal angle for phase matching. The gain spectrum with pump wavelength of 492.5 nm is much better than those with pump wavelengths of 400, 526.5 and 532 nm, at signal centre of 800 nm. 相似文献
3.
We describe a widely tunable phase sensitive fiber amplifier, based on narrowband parametric amplification in dispersion shifted fiber. Using a fiber with a zero dispersion wavelength of 1549?nm and a pump wavelength in the range of 1549?nm to 1532?nm, we obtained phase sensitive amplification between 1344?nm and 1781?nm, for an overall wavelength range of 437?nm. The amplifier threshold power is 7?W, and the maximum gain is 50?dB at a pump peak power of 25?W. The variance in gain due to phase sensitivity was measured to be up to 15?dB. 相似文献
4.
5.
We present numerical models of tri-valence erbium ion and thulium ion-co-doped fiber amplifiers pumped by 800-nm and 980-nm
lasers. The rate and power propagation equations of the models are numerically solved to analyze the gain as a function of
co-doping concentrations, fiber length and signal wavelength. The results reveal that with 800-nm or 980-nm pump, gain competition
exists between 1470- and 1530-nm bands, which may arise from the pump absorption competition and complicated energy transfer
between the two types of active ions, and the results further show that the gain spectra may cover 305 nm (1375–1680 nm) for
800-nm pump and 160 nm (1400–1560 nm) for 980-nm pump. The doping concentrations and fiber length may be tuned to reduce the
ripple of the gain spectra. 相似文献
6.
Parametric amplifiers driven by two pump waves are studied numerically. For typical parameters, one can design an amplifier that produces uniform gain over a range of wavelengths that extends at least 33 nm on either side of the average pump wavelength. 相似文献
7.
Enhancement of Gain in L-Band Bismuth-Based Erbium-Doped Fibre Amplifier Using an Un-pumped EDF and Midway Isolator 总被引:1,自引:0,他引:1 下载免费PDF全文
W.Y.Chong S.W.Harun H.Ahmad 《中国物理快报》2004,21(12):2452-2453
A hybrid L-band erbium-doped fibre amplifier (EDFA) with enhanced gain characteristic is demonstrated without a significant noise figure penalty. It uses a backward C-band amplified stimulated emission from both the ends of a bismuth-based EDFA system to pump an unpumped erbium-doped fibre (EDF) for gain enhancing. The maximum gain enhancement of 4.0dB is obtained at wavelength 1604nm with EDF length of 20m. The gain spectrum is reasonably fiat in this amplifier compared with the amplifier without an EDF. The gain varies from 27.4 dB to 30.2 dB at wavelength region 1564-1608 nm with incorporation of 20 m EDF. Noise figure also varies from 6.0 to 7.TdB at this wavelength region. 相似文献
8.
We describe a widely tunable synchronously pumped coherent source based on the process of narrowband parametric amplification in a dispersion-shifted fiber. Using an experimental fiber with a zero-dispersion wavelength of 1590 nm and pump wavelengths of 1530 to 1570 nm yields oscillations at 1970 to 2140 nm-the longest reported wavelength for a fiber parametric oscillator. The long-wavelength oscillations are accompanied by simultaneous short-wavelength oscillations at 1200 to 1290 nm. The parametric gain is coupled to stimulated Raman scattering. For parametric oscillations close to the Raman gain peak, the two gain processes must be discriminated from each other. We devised two configurations that achieve this discrimination: one is based on the exploitation of the difference in group delay between the wavelengths where Raman and parametric gain peak, and the other uses intracavity polarization tuning. 相似文献
9.
A broadband two-pump optical parametric amplifier with ultra-flat gain spectra is proposed in a single-section highly nonlinear fiber. By elaborately setting the dispersions and pump wavelength space, a gain over 250 nm with 0.02-dB uniformity is obtained. The pump polarizations and fiber length can be changed, achieving polarization-insensitive or higher gain, while the flatness and bandwidth of gain curve remain the same. 相似文献
10.
N. F. Andreev V. I. Bespalov V. I. Bredikhin S. G. Garanin V. N. Ginzburg K. L. Dvorkin E. V. Katin A. I. Korytin V. V. Lozhkarev O. V. Palashov N. N. Rukavishnikov A. M. Sergeev S. A. Sukharev G. I. Freidman E. A. Khazanov I. V. Yakovlev 《JETP Letters》2004,79(4):144-147
The ultra-broadband phase matching was experimentally observed in a DKDP crystal upon parametric amplification of signal radiation with a wavelength of 911 nm in a pump field with a wavelength of 527 nm. The original scheme was used to excite the first parametric amplification stage by chirped pulses of idler radiation with a wavelength of 1250 nm. The saturated gain of a three-stage parametric amplifier was equal to 108. 相似文献