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 器件的工作波長(zhǎng)為1 . 3 m ,集分束器、合束器、起偏器/檢偏器、相位調(diào)制器、波導(dǎo)吸收器等十三個(gè)功能單元于一體,除了單y多功能集成光路器件具備的功能外,它還具有拍頻檢測(cè)功能,因而對(duì)提高慣導(dǎo)級(jí)和高精度穩(wěn)瞄系統(tǒng)起著重要的作用,并直接影響著穩(wěn)瞄系統(tǒng)的高機(jī)動(dòng)性、抗沖擊力和過(guò)載能力的提高。