基于啁啾光纖光柵的波長解調(diào)儀研究
發(fā)布時間：2019-04-26 03:37
【摘要】：目前,在市場上還沒有發(fā)現(xiàn)基于啁啾光纖光柵的波長解調(diào)儀產(chǎn)品,但其具有的潛在優(yōu)勢不可忽視,如全光結(jié)構設計,無需機械調(diào)諧,提高了解調(diào)速率;波長解調(diào)精度和動態(tài)范圍可根據(jù)需求調(diào)整;支持串、并聯(lián)兩種網(wǎng)絡拓撲結(jié)構和成本低等。解調(diào)方案基于強度測量原理,所測光強與波長存在一一對應關系,但受制于光器件溫度敏感性,保證系統(tǒng)溫度穩(wěn)定性是需解決的關鍵問題。本文研究題目是基于啁啾光纖光柵的波長解調(diào)儀研究,設計目標包括0~50℃范圍內(nèi)解調(diào)波長溫度穩(wěn)定性控制在10nm內(nèi)等,主要內(nèi)容如下:1)設計了基于啁啾光纖光柵的波長解調(diào)系統(tǒng)。在光源和環(huán)形器間增加光隔離器,降低了反射光對光源輸出功率穩(wěn)定性的影響;將光、電路中的器件用熔接形式封裝成盒,便于對密閉空間溫度補償,降低溫度變化對系統(tǒng)整體性能的影響;針對光耦合器分光比易受溫度變化影響,采用基于三路光強解調(diào)的修正方案,將經(jīng)過啁啾光纖光柵的透射光加入計算,保證計算中分母的準確性,降低測量誤差。實驗采用溫控裝置對波長解調(diào)儀在同一中心波長下的測量結(jié)果多次檢測并取平均值,在0~50℃范圍內(nèi)的最大波長變化量減小到8pm,約是補償前的50%,即該波長解調(diào)儀的溫度穩(wěn)定性可達到8pm。2)將團隊研制的啁啾光纖光柵作為解調(diào)器,設計并制作了波長解調(diào)儀的性能樣機,通過評估系統(tǒng)性能指標,合理設計光電轉(zhuǎn)換和信號處理電路及器件選型,實現(xiàn)一套完整的電路解決方案。利用上述器件搭建基于啁啾光纖光柵的三路光強修正的波長解調(diào)系統(tǒng)并測試,測試結(jié)果表明:所設計的波長解調(diào)儀可實現(xiàn)波長動態(tài)范圍為1514.39~1524.51nm,單路解調(diào)波長精度最小值為1.9pm、最大值為16.4pm,多路波長精度平均值為6.78pm。本文創(chuàng)新點是采用團隊研制的啁啾光纖光柵作為解調(diào)器,制作波長解調(diào)儀性能樣機,在設計中考慮到光路器件的溫度敏感性,如光耦合器分光比的溫度波動等,提出了基于三路光強解調(diào)的修正方案。保證系統(tǒng)溫度穩(wěn)定性提高同時,可根據(jù)需求動態(tài)調(diào)整解調(diào)精度和測量路數(shù),使解調(diào)儀在各項指標上達到或接近設計目標水平。本文所做工作對推動采用啁啾光纖光柵實現(xiàn)波長解調(diào)方案在實驗室階段的研究和大規(guī)模應用具有實用價值。
[Abstract]:At present, the wavelength demodulator based on chirped fiber grating has not been found in the market, but its potential advantages should not be ignored, such as all-optical structure design, without mechanical tuning, so as to improve the demodulation rate. Wavelength demodulation precision and dynamic range can be adjusted according to the demand, supporting serial, parallel network topology and low cost. The demodulation scheme is based on the principle of intensity measurement. There is a one-to-one correspondence between the measured light intensity and the wavelength. However, due to the temperature sensitivity of the optical device, the key problem to be solved is to ensure the temperature stability of the system. The research topic of this paper is the research of wavelength demodulation instrument based on chirped fiber grating. The design objectives include demodulating wavelength and temperature stability in the range of 0 鈩，
本文編號：2465716
[Abstract]:At present, the wavelength demodulator based on chirped fiber grating has not been found in the market, but its potential advantages should not be ignored, such as all-optical structure design, without mechanical tuning, so as to improve the demodulation rate. Wavelength demodulation precision and dynamic range can be adjusted according to the demand, supporting serial, parallel network topology and low cost. The demodulation scheme is based on the principle of intensity measurement. There is a one-to-one correspondence between the measured light intensity and the wavelength. However, due to the temperature sensitivity of the optical device, the key problem to be solved is to ensure the temperature stability of the system. The research topic of this paper is the research of wavelength demodulation instrument based on chirped fiber grating. The design objectives include demodulating wavelength and temperature stability in the range of 0 鈩，
本文編號：2465716
本文鏈接：http://sikaile.net/kejilunwen/dianzigongchenglunwen/2465716.html
教材專著
