自發射噪聲 的英文怎麼說
中文拼音 [zìfāshèzàoshēng]
自發射噪聲
英文
spontaneous emission noise-
For micro - cavity semiconductor laser, station model is proposed in this paper and its steady - state and instantaneous characteristics when the coupling efficiency of spontaneous emission into a lasing mode is equal to 1 are analysised. for current noise, sp noise, noise, p noise, as well as current modulation, sp modulation, modulation and p modulation, using small - signal approximation, we derive the laser ' s corresponding transfer functions. and we calculate their signal - to - noise ratio ( snr ) gain in various parameters through frequency domain analysis in the premiss of large input snr
本文對于微腔半導體激光器，提出站模型，能夠較直觀簡潔地分析微腔半導體激光器的穩態和瞬態特性，利用此模型對具有重要實用價值的= 1的微腔半導體激光器進行了討論；對于電流i噪聲、自發發射壽命_ （ sp ）噪聲、自發發射因子噪聲、光子壽命_ p噪聲，以及電流調制、 _ （ sp ）調制、調制、 _ p調制，在小信號近似下，得到了相應的激光器的傳遞函數；在大信噪比的前提下，對激光器進行了頻域分析，分別計算了它們在不同參數下的信噪比增益，分析了其抗噪聲性能。The amplified spontaneous emission ( ase ) is studied. both the forward and backward ase is simulated and their characters are analyzed in detail. then the dual stage cascade structure is presented as a solution to reduce the ase noise
2 .研究了edfa中放大的自發輻射噪聲光（ ase ） ，詳細分析了前後向ase噪聲光的性質，在此基礎上，提出了雙段級聯結構抑制ase噪聲光，並對這種方法進行了理論和實驗研究。The justification of(13. 2-2)as a representation of spontaneous emission noise is provided by the discussion preceding(13. 1-7).
根據上面對式（131-7）的討論，就可以將公式（132-2）看作是自發輻射噪聲的表達式。Because power management in this thesis aims at amplified spontaneous emission noise of erbium ? oped fiber amplifier ( edfa ), the thesis introduces the simplified stark ? split energy levels of er3 ", amplified working mechanisms of er3 * and working performance of edfa in details
因為本文所採用的功率管理主要是針對edfa摻餌光纖放大器所產生的自發輻射噪聲去採取均衡措施，所以論文中詳細介紹了edfa中鉺離子的stark分裂的簡化的能級模型、鉺離子的放大工作機理及edfa的工作特性。Forward spontaneous raman scatter noise in the fiber raman amplifier
光纖拉曼放大器中的前向自發拉曼散射噪聲The methods and the experimental setups for measuring the gain and noise figure of an edfa are emphasized. we introduce how to measure the characteristics of each component of an edfa, especially the gain and absorption coefficient of an erbium doped fiber ( edf ). thirdly, four types of simple and novel l - band edfa structures with low noise, high gain and low gain ripple are proposed to satisfy the requirement of a dwdm system
基於考慮自發輻射噪聲（ ase ）的giles模型，建浙江大學博士學位論文立了這種edfa的全光增益箱制理論模型;理論和實驗分析了四種可能的光路結構、泵浦波長、光纖光柵反射波長和反射率、泵浦功率以及摻餌光纖長度等參t對其箱制特性的影響。4. the lpfgs are used in single wavelength er - doped fiber amplifiers ( edfas ) as a spontaneous emission noise ( ase ) filter, and the gain of the edfa is increased by 7db and the noise figure ( nf ) is decreased by 0. 5db, for the first time
4 、成功研製了摻鉺光纖放大器，首次將高頻co2激光脈沖寫入的長周期光纖光柵應用到摻鉺光纖放大器中作為自發輻射噪聲濾波器，使edfa的增益提高了7db 、噪聲系數降低了0 . 5db 。We design the system circuit which is composed of emission and receiving circuit. the results of experiments show that the system can localize the magnetic sensor and it can be expected to play a roll in medical treatment after further research
在電路設計中，我們根據磁場模型的特點設計了具有自動增益和倒相控制功能的發射電路以及高放大倍數和低噪聲的接收電路。The approach in this thesis first design the best performance channel code in different channels and different snr, then design the adaptive coder / decoder. the receiver continually estimates the fading and noise of the channel and transmits them to the transmitter by reverse channel. then the transmitter use these information to choose the best channel code adaptive the current channel
本文提出的自適應調制方案首先設計各種通道衰落和信噪比條件下的最優通道編碼，再設計一種能夠完成這些通道編碼解碼的自適應編碼解碼器；接收機不斷估計通道的衰落程度和噪聲功率，並通過反向通道反饋給發射機；發射機據此選用最適合當前通道的通道編碼，實現自適應。It is considered that when the dominant frequencies of these dynamics components are close to the natural frequencies of the friction system, the system will show a resonant behavior and emit associated noise
當動態摩擦力頻率接近摩擦系統的自然頻率時，系統就發生摩擦振動從而發射噪聲。根據這個假設，從摩擦學的角度解釋了摩擦噪聲一般發生在摩擦系數比較大的區域的原因。分享友人