给出了阶梯型三能级原子系统在相等偏调情况下的运动主方程，得到了双光子增益系数公式。
The master equation of a three-level atomic system interacting with a two-mode field at two-photon resonance is given. The two-photon gain coefficient formula is deduced.
分析有源区内载流子和VCL光子密度的变化，揭示了增益钳制的物理机理。
Analyzing the carrier density and photon density of VCL in active region, the physical mechanism of gain clamping was revealed.
利用速率方程理论，得到包含激光增益介质反转密度、光子密度和饱和吸收介质基态布居数密度的速率方程组。
Using rate equation theory, the equation group including the population inversion density of the gain medium, photon density and the absorber ground state population density is acquired.
光子和散射颗粒的多次弹性散射可以增大有效增益长度。
The multiple elastic scattering of photon can effectively enhance the gain length.
本文的结果表明，激光增益来源于两个基本过程：两个光子过程和两步过程。
Our results show that the laser gain comes from two basic processes, i. e., a two-photon process and a two-step process.
该探测器属于光子计数成像探测器，具有增益高、图像畸变小、分辨率高等优点。
This detector is a kind of photon counting imaging detectors, which has some properties such as high gain, small distortion and high resolution.
并指出，激光的弱讯号增益来源于两个基本过程：两个光子过程和两步过程。
The weak-signal gain of laser comes from two elementary processes:two-photon process and two-step process.
研究了强非线性色散位移光纤和光子晶体光纤中的光纤参量放大增益特性。
The characteristic of fiber-optic parametric amplification in the highly nonlinear dispersion-shifted fiber and photonic crystal fiber were researched in detail.
本论文就是针对一维光子晶体传光特性及其对掺铒光纤放大器增益平坦改善的应用展开的研究。
In this paper, researches based on one-dimensional photonic crystals and the application on flattening improvement about Erbium-Doped Fiber Amplifier (EDFA).
为避免产生光子并合现象的产生，可以利用在接收光路上加装中性衰减片、提高光电倍增管开始工作的高度和降低光电倍增管增益等措施来分段测量，提高臭氧测量的精度。
To avoid the phenomena of photon overlap, many measures such as neutral optical attenuator, gate witch and reducing the gain of PMT, are taken to enhance accuracy of ozone measurements.
本文设计了一种新型基于哑铃型光子带隙（PBG）的宽带高增益E形贴片天线。
This paper presents a new wide-band and high-gain E-shaped patch antenna based on dumbbell-shaped PBG structure.
本文设计了一种新型基于哑铃型光子带隙（PBG）的宽带高增益E形贴片天线。
This paper presents a new wide-band and high-gain E-shaped patch antenna based on dumbbell-shaped PBG structure.
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