branch n. 1.(树)枝〔泛指大枝或小枝;bough 特指大枝,也指连花、果折下的枝;limb 指大枝;twig 指小枝〕。 2.支脉;支派;支管;支线;(家族的)支系;【语言学】(语系的)支,族。 3.(学科)分科;部门,支部,分部,分行;分店。 4.〔美国〕支流,小河,小川。 5.【电学】分流;【计算机】转移。 the branchs of a deer's antelers 鹿角的岔枝。 branch road 岔道。 the various branches of learning 各门学科。 the executive branch of the government 政府的行政部门。 an overseas branch 海外分店。 the Germanic branch of the Indo-European language family 印欧语系的日耳曼语族。 a party branch 党支部。 root and branch 彻底的[地]。 vi. 1.(树)出枝,开叉。 2.分部,分门;分岔;分支。 The main road branches off to the left. 大道向左分出一条岔路。 Numerous lesser roads branched off from the main highway. 从主要公路上分出无数小道。 vt. 1.使分枝。 2.用枝、叶、花等图案装饰(织物)。 branch forth (树)扩展枝叶;(商店等)扩展分支机构。 branch off [away] (道路等)分叉,岔开。 branch out 1. (树)发枝,长出枝条;(话等)横生枝节。 2. (事业等)扩大规模。 His firm branched out to New York. 他的公司把分支机构扩大到了纽约。
The numerical and experimental results of this y - branch structure indicate that the proposed y - branch structure , without extra fabrication technologies , has a lower excess loss as compared with the conventional ones . optimal designs of the structural parameters for the multimode interference coupler are carried out . low loss and high uniformity of the multimode interference couplers are achieved when the waveguide is weakly guiding 研究了y分支耦合器中分支顶端间距(为工艺制作方便)带来的附加损耗,提出了低损耗新型y分支耦合器结构,并给出了相关结构参数的优化设计方法,我们的理论计算和实验测试结果均表明,该新型结构可以在常规光波导制作工艺下提高器件的指标。
It is composed of thirteen functin ? components including two 3 - db y - junction power splitter , two directional couplers , two waveguide attenuators and one polarizer of waveguide itself . the prominent feature of the device is that it has a beat detection function with respect to the single y - branch mioc device , and it plays an important role in improving the inertial - grade and the high precision steady - aim system because of the beat detection function . farthermore it has direct influence on the improvement of the high flexibility , shockproof and overload - resistance for the steady - aim system 器件的工作波长为1 . 3 m ,集分束器、合束器、起偏器/检偏器、相位调制器、波导吸收器等十三个功能单元于一体,除了单y多功能集成光路器件具备的功能外,它还具有拍频检测功能,因而对提高惯导级和高精度稳瞄系统起着重要的作用,并直接影响着稳瞄系统的高机动性、抗冲击力和过载能力的提高。