gain flatness 中文意思是什麼

gain flatness 解釋
增益平度
  • gain : vt 1 獲得；博得，掙得；贏得，打勝（戰爭、官司）。2 吸引；爭取…（到一邊），說服。3 （尤指通過努力...
  • flatness : n. 1. 平坦，平滑。2. 直率，果斷。3. 無變化，單調。4. （音的）低沉；（市況的）蕭條。
  1. The optimization of the position and amplitude of the lpfg in the edf is also investigated. on the other hand, the edfa with 1db gain flatness is demonstrated by using the lpfg as a gain equalizer, and this novel gain equalizer inserted in the er - doped fiber ( edf ) increases the gain by 1. 5db

    首次利用這種新型濾波器作為edfa的增益平坦器，獲得了小於1db的增益平坦度。 5 、研究了長周期光纖光柵的特殊應用，提出了利用長周期光纖光柵對外界折射率的敏感特性可製成調制器和光開關的設想。
  2. Secondly, basing on the theory of on - off gain of small signal, the raman gain coefficient for frequency shift between 0. 5 and 20 thz of standard sigle mode optical fiber is measured by pump - probe method through a super luminescent diode ( sld ) as a broadband small signal probe source. thirdly, numerical simulation analysis of gain characteristic of raman fiber amplifier for c band wdm signal light is made according to the raman gain coefficient of the fiber measured before through target and four rank runge - kutta method. at the invariability of wavelength and maximum power of each of two pumps, schematic of powers of two pumps for best flatness on c band wdm optical gain was found out, at the same time, the factors of resulting in gain saturation is analyzed, too

    本文首先應用經典的電磁理論對拉曼光纖放大器的工作機制進行了分析，然後，根據小信號理論推導出的開關增益求出了光纖拉曼增益系數的表達式，採用泵浦-探測波的方法，利用超輻射激光二極體（ superluminescentdiode簡稱sld ）作為探測光源，測量了所用標準單模光纖頻移為0 . 5 - 20thz的拉曼增益系數，之後根據所測得的光纖的拉曼增益系數譜對應用該類光纖構成的放大c波段wdm光信號的拉曼光纖放大器的增益特性採用打靶法和四階龍格- - -庫塔進行了數值計算，在給定了兩個泵浦光源的波長和最大功率后，找出了反向泵浦情況下使c波段wdm光源增益最平坦的兩個泵浦的各自最佳功率，同時也分析了導致信號光飽和的原因。
  3. Raman fiber amplifier （ rfa ） is a kind of optical amplifier that can amplify signal light directly through nonlinear interaction of high intensity pump and signal light in fiber. whereas the spectrum of raman gain coefficient of optical fiber is not flat, the gain of signal light with different wavelength induced by a single pump is rather different, when wavelength division multiplexing ( wdm ) signal light is amplified by a single pump, the gain spectrum of the wdm signal light is not flat. the flatness of the wdm signal light has important impact on the optical signal - to - noise ratio ( osnr )

    拉曼光纖放大器（ ramanfiberamplifier ，簡稱rfa ）利用高強度的泵浦光與信號光在光纖中的非線性相互作用實現信號光的直接放大，但是由於光纖的拉曼增益系數譜很不平坦，所以同一泵浦光源對不同波長信號光的增益就存在很大的差別，因此，用單泵浦光源來放大波分復用（ wavelengthdivisionmulti - plexing ，簡稱wdm ）信號光時，各信號光的增益值就有很大差異， wdm信號增益的平坦度對光信噪比（ opticalsignal - noiseratio ，簡稱osnr ）有重要影響。
  4. A dynamic gain equalizer device including control circuit, mechanical structure and control program was designed using a cooler and a pzt. a dynamic gain equalizing experiment of the edfa using the designed dynamic gain equalizer was accomplished, and a 1. 2db flatness in the range of 32nm at c - band was obtained. finally, some future improvements were discussed in this

    Iv .設計了一種利用製冷器和壓電陶瓷等來實現動態增益均衡器的裝置，設計了控制電路、機械結構和演算法程序，用這個動態增益均衡器對edfa的增益輸出譜線進行了動態增益實驗，實驗結果基本滿足要求，根據實驗結果，文中還討論了一些改進方案。
  5. Both of the numeric simulations and the experimentations indicate that the c band raman fiber amplifier can be satisfied with some gain flatness when numbers and wavelengths of pump are installed while powers of pump are arranged properly. the method of measuring fiber raman gain coefficient is adopted to other type

    數值計算和試驗上都證明了在合理地選取泵浦源的個數和波長的情況下，通過對各個泵浦功率配置的調整， c波段的拉曼光纖放大器可以滿足一定的增益平坦度。
  6. Secondly, novel genetic algorithm is developed to optimize the wavelength and power value of the pumping sources in the mutli - wavelength backward pumping fra to get the best gain flatness

    第二設計新型的遺傳演算法，結合前面提到的多維并行打靶法來優化多波長後向泵浦fra各個泵浦光的波長、功率值，以得到更好的增益平坦度。
  7. The average gain and nf are 22. 22db and 8. 69db respectively. gain flatness under single and double lasers control are 0. 69db and 1. 51db. a gain - clamped dual - stage l - band edfa by utilizing backward c - band ase as control light is presented for the first time

    2 .我們還提出了一種優化反射式edfa噪聲性能的方案，通過利用高雙折射環鏡代替普通光纖環鏡來抑制鉺纖的前向ase ，雙通放大器在1580 . 84nm ~ 1588 . 48nm范圍內的平均噪聲系數減少了3 . 7db 。
  8. This paper studies the design methods and techniques of the broadband lna. using negative feedback techniques and lossy match method, a broadband lna acceptable for sdr is presented. the measured results showed that over 30mhz ~ 3000mhz, the lna achieved a maximum noise figure of 2. 0db, a power gain of 22db with gain flatness of less than 2. 0db

    本文最後對寬帶低噪聲放大器的設計方法進行了詳細探討，並運用負反饋技術和有損匹配的方法，研製了一種適合軟體無線電應用的寬帶低噪聲放大器，經測試，在30 3000mhz頻率范圍內，噪聲系數nf 2 . 0db ，增益g = 22db 2 . 0db 。
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