Because of its excellent electro - optic effect , very short electro - optical response time , and wide transparent wavelength range , linbo _ 3 material meet the demands of low - loss , low drive voltage , high - speed and wide - band intensity modulator 又由于linbo _ 3材料具有良好的电光效应、很短的电光响应时间、较宽的透明波长范围,因而适合用于制作低损耗、低电压、高速宽带强度调制器。
The resonance - enhanced multi - photon ionization ( rempi ) spectrum of no in the region of 420 - 680nm is obtained by using optical parameter generator and amplifier ( opg / opa ) as radiation source . the opg / opa was pumped by nd : yag ( quantel ) laser 本工作以超短脉冲( 35ps ) nd ： yag激光的三倍频输出( 355nm )泵浦光学参量发生放大器作为激发源，获得了no分子在420 680nm波长范围内的多光子共振离化光谱。
The applications of organic semiconductor as active layers in light - emitting devices offer several prominent advantages such as high efficiency , high brightness and low cost . another advantage is that the emitting wavelength can be chemically tailored due to the band gap 有机半导体微腔调谐发光器，发射光波长可通过分子设计调节，在紫外到红外的波长范围内可调，实现全色光发射，受到人们的重视。
The wavelengths of reflectance peaks and vales are got by spectral derivative method in section 3 . 3 . mechanism of them is analyzed . red tide and normal seawater , as well as some different dominant species of red tide , such as chattonella marina and mesodinium rubrum , can be discriminated by using the wavelength information of second reflectance peak 3 . 3节运用该方法得出了实验赤潮水体光谱曲线的两个反射峰和一个吸收峰的波长范围，并对其产生机理进行了分析;更为重要的是，利用光谱曲线第二反射峰的波长位置实现了赤潮与非赤潮水体的光谱辨别，以及红色中绕虫、海洋褐胞藻等不同优势种类赤潮的识别。
Generally , the designed channel spacing of itu - t standard in wdm systems is from 0 . 8nm to 1 . 6nm , which is much larger than the spacing required by actual communication bandwidth . for example in lightwave transmission systems , a sghz channel occupies only 0 . 04nm at the wavelength band of 1 . 55 n m . thus , most of the bandwidth in the actual transmission systems may be wasted Itu - t标准中wdm系统设计的信道间距为0 . 8nm - 1 . 6nm ，这远远大于实际使用的信道带宽，例如一个带宽为5ghz的信道在1 . 55 m波段只占据了约0 . 04nm的波长范围，因而导致大部分的带宽被浪费。
The photoconductivity of single - layered photoreceptors , where mwcnt bonded by tamnpc ( mwcnt - b - tamnpc ) served as the charge generation material ( cgm ) , was studied by the xerographic photoinduced discharge method . the photosensitivity of mwcnt - b - tamnpc was better than that of pristine tamnpc and mwcnt / tamnpc composite obtained by simply physical blending . it is the photoinduced charge transfer from tamnpc to mwcnt in mwcnt - b - tamnpc that contributes to the higher photosensitivity of mwcnt - b - tamnpc 研究发现该复合光电导材料体系的光电导性能在500一760nm波长范围内都有大幅度提高，例如679nm波长激发时，该复合材料的光敏性是同等条件下酞著锰的4倍，是四氨基酞背锰/碳纳米管简单物理共混材料的8 . 5倍。
Ultraviolet absorption detector , photodiode array detector ( dad ) , fluorescence detector , and electrochemical detector are optional detectors , response value of which is relative to not only quality of the object under test , but also structure of the compound ; refractive index detector and evaporative light - scattering detector are universal detector , responding to structure of all compounds ; evaporative light - scattering detector is quality - type detector , whose responding value only relates to quality of the object under test for compounds with similiar structures ; photodiode array detector ( dad ) can , at the same time , record absorption spectra of the object under test in a prescribed wave scope , consequently , it can be used in spectrum control and inspection of purity of chromatographic peaks of the object under test 紫外、二极管阵列、荧光、电化学检测器为选择性检测器，其响应值不仅与待测物的质量有关，还与化合物的结构有关；示差折光检测器和蒸发光散射检测器为通用型检测器，对所有的化合物结构均有响应；蒸发光散射检测器属质量型检测器，对结构类似的化合物，其响应值几乎仅与待测物的质量有关；二极管阵列检测器可以同时记录待测物在规定波长范围内的吸收光谱，故可用于待测物的光谱管制和色谱峰纯度的检查。
In this dissertation , a boa - type waveguide optic switch with double - heterostructure gaas / gaalas has been researched . gaas - based integrated optical devices have good temperature , good anti - radiation and optical - transmission characteristics , and also have wide transparent range of wavelength . they can also be integrated on a chip with optical active devices and electronic devices , such as semiconductor laser , optical modulation , optical amplifier , pin , and so on 基于gaas材料的集成光学器件不仅具有良好的光传输特性、温度特性、抗辐射能力和其较宽的透明波长范围，还有望进一步实现芯片与光源、光调制器、光探测器和半导体光放大器等其它光电器件以及集成电路的单片集成；采用gaas gaalas双异质结材料制作的光开关可以得到较低的开关电压，而且采用gaas gaalas异质结材料的光传输损耗很小。
Emission ( by atoms , molecules or ions in a material ) of optical radiation which , for certain wavelengths or restricted regions of the spectrum , is in excess of the radiation due to thermal emission from the material at the same temperature , as a result of these particles being excited by energy other than thermal agitation 原子、分子或离子由于受能量的激发而产生的某一波长或波长范围内的光辐射，这种光辐射的能量超过了在相同温度下该材料产生的热辐射的能量。
The efficient sppc had been performed with 1 - hz - repetition - rate 532nm nanosecond pulses , in which phase conjugate reflectivity as high as 21 . 5 % was obtained . when sppc were operated in ce : batio3 with 532nm , 632 . 8nm and 790nm cw lasers , the maximum sppc reflectivity of 54 . 1 % , 88 . 2 % and 80 . 5 % were obtained , respectively . unlike the results reported before that four - wave mixing by stimulated photorefractive backscattering ( spb - fwm ) only exists at short wavelengths while four - wave mixing by total internal reflection ( tir - fwm ) only exists at long wavelengths , both of these two mechanisms coexist at all wavelengths from 532nm to 790nm in our experiments 通过大量的实验全面研究了ce ： batio _ 3自泵浦位相共轭特性：在低重复频率( 1hz ) 、 532nm调q激光泵浦时最高获得了21 . 5的位相共轭反射率，而此前报道过的建立位相共轭脉冲光最低重复频率是10hz ；实验中发现在532nm 790nm波长范围内，在不同的波长激光泵浦时，同时存在两种自泵浦位相共轭机制：全内反射?四波混频( tir - fwm )和受激背向散射?四波混频( spb - fwm ) ；在连续激光泵浦时，对532nm 、 632 . 8nm和790nm三种波长，最高分别获得了54 . 1 、 88 . 2和80 . 5的位相共轭反射率；同时还研究了自泵浦位相共轭光的时间稳定性。
