本文關(guān)鍵詞：一種新型瑞利BOTDA系統(tǒng)的研究　出處：《紅外與激光工程》2017年01期 　論文類型：期刊論文

  更多相關(guān)文章： 瑞利布里淵光時(shí)域分析 單端 受激布里淵散射 瑞利散射

【摘要】：搭建了一種新型的基于瑞利散射的布里淵光時(shí)域分析(Rayleigh Brillouin optical time domain analysis,RBOTDA)傳感系統(tǒng)。該系統(tǒng)工作在單端,能克服傳統(tǒng)BOTDA雙端接入的缺點(diǎn);采用兩個(gè)EOM并聯(lián)的結(jié)構(gòu)產(chǎn)生含有連續(xù)基底光的脈沖光,探測(cè)光由基底連續(xù)光的瑞利散射提供,避免了多種受激布里淵散射(stimulated Brillouinscattering,SBS)作用帶來(lái)的干擾,信噪比更高,傳感距離更長(zhǎng);采用雙邊帶探測(cè)方法,有效減少泵浦脈沖的損耗與非本地效應(yīng)。建模解析了該系統(tǒng)中的SBS作用過(guò)程,并實(shí)驗(yàn)驗(yàn)證了系統(tǒng)的可行性。結(jié)果表明,布里淵增益譜完好地貼合洛倫茲曲線,非本地效應(yīng)得到了有效的抑制;在2.4km光纖上,室溫25℃下泵浦脈寬50ns時(shí),布里淵頻移為10.867GHz,布里淵線寬約為40.21MHz。
[Abstract]:A novel Brillouin optical time domain analysis based on Rayleigh scattering is proposed. Rayleigh Brillouin optical time domain analysis. RBOTDA sensor system, which works in single terminal, can overcome the shortcoming of traditional BOTDA dual terminal access. Two EOM parallel structures are used to generate pulsed light with continuous substrate light, and the detection light is provided by Rayleigh scattering of the substrate continuous light. The interference caused by stimulated Brillouin scattering (SBS) is avoided, the signal-to-noise ratio is higher and the sensing distance is longer. The two-sideband detection method is used to effectively reduce the loss of pump pulses and non-local effects. The SBS process in the system is modeled and analyzed, and the feasibility of the system is verified by experiments. Brillouin gain spectrum fits the Lorentz curve perfectly and the non-local effect is effectively suppressed. The Brillouin frequency shifts to 10.867 GHz and the Brillouin linewidth is about 40.21 MHz at room temperature of 25 鈩，

本文編號(hào)：1434555