本文選題：可調(diào)諧半導(dǎo)體激光器 + 激光器波長穩(wěn)定　； 參考：《華中科技大學(xué)》2015年碩士論文

【摘要】：可調(diào)諧半導(dǎo)體激光器是下一代動態(tài)光網(wǎng)絡(luò)的關(guān)鍵器件之一。在動態(tài)光網(wǎng)絡(luò)中,要求標(biāo)準(zhǔn)ITU-T通道的光組和光包的長度在100ns到10ms范圍內(nèi)。因此,可調(diào)諧激光器的波長穩(wěn)定性對其在靜態(tài)光網(wǎng)絡(luò)、未來光分組交換(OPS)和光突發(fā)交換(OBS)網(wǎng)絡(luò)中的應(yīng)用非常重要。一種有效的波長穩(wěn)定方法是根據(jù)輸出光信號經(jīng)過光濾波,例如布拉格光纖光柵,波導(dǎo)陣列光柵或F-P標(biāo)準(zhǔn)具后得到的反饋波長漂移信號,通過調(diào)諧激光器相位節(jié)對波長漂移進行補償。本文主要研究這種波長鎖定環(huán)路對可調(diào)諧激光器的快速波長檢測與控制。主要工作可分為以下幾個部分:簡要分析了分布式布拉格反射(DBR)型半導(dǎo)體激光器的結(jié)構(gòu)和波長調(diào)諧原理,并由此引出了波長檢測和波長控制系統(tǒng)的結(jié)構(gòu)原理。分析了由快速波長切換引起的熱效應(yīng),并闡述了多節(jié)DBR可調(diào)諧激光器無模式跳變的波長鎖定原理。根據(jù)光學(xué)和現(xiàn)代控制理論建立了關(guān)于波長反饋鎖定環(huán)路系統(tǒng)的線性連續(xù)控制理論模型,利用該模型和更真實的數(shù)值仿真模型先后對系統(tǒng)進行了分析,通過仿真得到環(huán)路最優(yōu)比例積分微分(PID)控制系數(shù)。研究了PID參數(shù)與波長鎖定的關(guān)系,并分析了系統(tǒng)帶寬對系統(tǒng)性能的影響。設(shè)計開發(fā)了基于FPGA的控制電路板,實現(xiàn)了開發(fā)板對取樣光柵分布式布拉格反射(SGDBR)激光器的波長控制和波長檢測。通過對FPGA內(nèi)部編程,實現(xiàn)了對SGDBR激光器的快速鎖定,并對鎖定的精度,長期穩(wěn)定性和鎖定時間進行了測量分析�？烧{(diào)諧激光器波長反饋環(huán)路系統(tǒng)的理論和實驗研究結(jié)果,可以給應(yīng)用在未來動態(tài)光網(wǎng)絡(luò)中的可調(diào)諧半導(dǎo)體激光器的波長穩(wěn)定系統(tǒng)設(shè)計提供參考。
[Abstract]:Tunable semiconductor laser is one of the key devices in the next generation dynamic optical network. In dynamic optical networks, the length of optical groups and packets of the standard ITU-T channels is required to range from 100ns to 10ms. Therefore, wavelength stability of tunable lasers is very important for their applications in static optical networks, future optical packet switching (OPS) and optical burst switching (OBS) networks. An effective wavelength stabilization method is to obtain feedback wavelength drift signals based on output optical signals, such as fiber Bragg gratings, waveguide arrays gratings or F-P standards. Wavelength drift is compensated by tuning laser phase knots. This paper focuses on the fast wavelength detection and control of the tunable laser with this wavelength locking loop. The main work can be divided into the following parts: the structure and wavelength tuning principle of distributed Bragg Reflectance (DBR) semiconductor laser are analyzed, and the structure principle of wavelength detection and wavelength control system is derived. The thermal effect caused by fast wavelength switching is analyzed, and the wavelength locking principle of multisection DBR tunable laser without mode jump is described. According to the optical and modern control theory, the linear continuous control model of the wavelength feedback locked loop system is established. The system is analyzed successively by using this model and the more realistic numerical simulation model. The loop optimal proportional integral differential (pid) control coefficient is obtained by simulation. The relationship between pid parameters and wavelength locking is studied, and the influence of system bandwidth on system performance is analyzed. The control circuit board based on FPGA is designed and developed. The wavelength control and wavelength detection of sampled grating distributed Bragg Reflectance (SGDBR) laser are realized. The fast locking of SGDBR laser is realized by programming the FPGA, and the precision, long-term stability and locking time of the lock are measured and analyzed. The theoretical and experimental results of the tunable laser wavelength feedback loop system can provide a reference for the design of the tunable semiconductor laser wavelength stabilization system in the future dynamic optical network.
【學(xué)位授予單位】：華中科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TN248.4

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