發(fā)布時間：2018-11-06 18:01

【摘要】：隨著光通信技術(shù)的日益成熟和微波射頻通信技術(shù)的飛速發(fā)展，兩者融合的微波光子技術(shù)受到了越來越多研究者的親睞。由于優(yōu)質(zhì)的微波信號源是一切微波領(lǐng)域應(yīng)用的基礎(chǔ)，，以及激光器性能的提高和各種光子器件工藝的完善，光域中產(chǎn)生高品質(zhì)的微波信號顯示出了明顯的優(yōu)勢，其中光電振蕩器（OEO）具有突出的表現(xiàn)。本文以光電振蕩器小型化為主線，分別對其中的高Q儲能單元和窄線寬激光器進(jìn)行了相應(yīng)的研究。 在高Q儲能單元方面，研究了易集成的硅基微環(huán)諧振腔的光信號處理技術(shù)。在理論分析微環(huán)諧振腔基本性能的基礎(chǔ)上，首次提出了基于串聯(lián)雙微環(huán)諧振腔熱非線性效應(yīng)的全光開關(guān)的方案，相對于單微環(huán)結(jié)構(gòu)，雙微環(huán)結(jié)構(gòu)可以有效提高光開關(guān)消光比，最終獲得了消光比為20.2dB和開關(guān)時間為微秒量級的全光開關(guān)；其次首先分析了10μm半徑單微環(huán)諧振腔的延時特性，獲得了15.7ps的最大延時量，在此基礎(chǔ)上，提出了基于并聯(lián)雙微環(huán)諧振腔的雙波長超寬帶信號的方案，雙環(huán)半徑都為20μm，最終實現(xiàn)了間隔為0.84nm的雙波長單極性超寬帶信號，脈寬分別為33.96ps和53.19ps。 采用窄線寬的布里淵光纖激光器作為OEO的起振源。在理論分析布里淵光纖激光器的基礎(chǔ)上，首次提出了窄線寬單縱模雙環(huán)布里淵光纖激光器的方案，主腔長度為100m和50m，而副光纖環(huán)配置為10m的長度，據(jù)維納效應(yīng)，可以保證激光器單模運行，由于主腔長度大于目前已報道的布里淵激光器長度（10m），那么在精細(xì)度和腔損一致的情況下，閾值減小到56mW和99mW，線寬為0.41kHz和3.23kHz。另一方面，光纖激光器的穩(wěn)定性也是一個重要的指標(biāo)，提出了基于保偏光纖光延時線的自動跟蹤系統(tǒng)，實現(xiàn)了激光器的穩(wěn)頻，測得一小時內(nèi)輸出功率波動為6%。 高階斯托克斯波會直接影響到OEO的性能，因此在窄線寬單縱模布里淵光纖激光器的基礎(chǔ)上，提出可調(diào)多波長雙環(huán)布里淵光纖激光器的方案，對多級SBS效應(yīng)進(jìn)行了相應(yīng)的研究。主腔長度也選為100m和50m，副光纖環(huán)長度同樣配置為10m，可以保證每一階斯托克斯波和反斯托克斯波處于單縱模運行狀態(tài)，理論分析了每一階斯托克斯波線寬之間的關(guān)系，以及影響此激光器穩(wěn)定的主要因素，最終獲得了間隔為0.084nm的51個多波長激光器、可調(diào)范圍為30nm，且輸出功率穩(wěn)定。
[Abstract]:With the maturation of optical communication technology and the rapid development of microwave radio frequency communication technology, the microwave photonic technology which combines the two technologies has been favored by more and more researchers. Because the high quality microwave signal source is the foundation of all microwave applications, the improvement of laser performance and the improvement of various photonic device technology, the generation of high quality microwave signal in optical domain shows obvious advantages. Among them, the optoelectronic oscillator (OEO) has outstanding performance. In this paper, the high Q energy storage unit and the narrow linewidth laser are studied based on the miniaturization of the optoelectronic oscillator. In the aspect of high Q energy storage unit, the optical signal processing technology of silicon based micro ring resonator is studied. Based on the theoretical analysis of the basic properties of the microring resonator, an all-optical switching scheme based on the thermal nonlinear effect of the series double-microring resonator is proposed for the first time. Compared with the single-ring structure, the dual-microring structure can effectively improve the extinction ratio of the optical switch. Finally, an all-optical switch with extinction ratio of 20.2dB and switching time of microsecond is obtained. Secondly, the delay characteristics of 10 渭 m radius single microring resonator are analyzed, and the maximum delay quantity of 15.7ps is obtained. Based on this, a dual-wavelength ultra-wideband (UWB) signal scheme based on parallel double-microloop resonator is proposed. The double ring radius is 20 渭 m. Finally, bipolar unipolar UWB signals with interval of 0.84nm are realized. The pulse widths are 33.96ps and 53.19ps, respectively. A narrow linewidth Brillouin fiber laser is used as the starting source of OEO. Based on the theoretical analysis of Brillouin fiber laser, the scheme of narrow linewidth single longitudinal mode double ring Brillouin fiber laser is proposed for the first time. The main cavity length is 100 m and 50 m, while the secondary fiber ring is 10 m long. According to Wiener effect, Because the length of the main cavity is larger than the reported length of Brillouin laser (10m), the threshold value is reduced to 56mW and 99mW, and the linewidth is 0.41kHz and 3.23kHz when the fineness and cavity loss are the same. On the other hand, the stability of fiber laser is also an important index. An automatic tracking system based on polarization-maintaining optical delay line is proposed. The frequency stability of the laser is realized, and the output power fluctuation within one hour is measured to be 6. High order Stokes wave will directly affect the performance of OEO. Therefore, based on narrow linewidth single longitudinal mode Brillouin fiber laser, a scheme of adjustable multi-wavelength double-ring Brillouin fiber laser is proposed, and the multistage SBS effect is studied accordingly. The length of the main cavity is also chosen to be 100m and 50m, and the length of the secondary fiber ring is 10m, which can ensure that every Stokes wave and anti-Stokes wave are in a single longitudinal mode state. The relationship between the linewidth of each order Stokes wave is theoretically analyzed. Finally, 51 multi-wavelength lasers with an interval of 0.084nm are obtained. The adjustable range is 30 nm and the output power is stable.
【學(xué)位授予單位】：天津大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2014
【分類號】：TN911.7;TN248

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