本文選題：半導(dǎo)體激光陣列 + 光束整形　； 參考：《北京工業(yè)大學(xué)》2015年碩士論文

【摘要】：在激光加工應(yīng)用中,激光器的電光轉(zhuǎn)換效率高、單位能耗低,可降低加工成本,半導(dǎo)體激光器可以滿足這方面的要求,被越來(lái)越多地應(yīng)用于工業(yè)加工,如激光熔覆、熱處理、表面硬化等。光纖耦合半導(dǎo)體激光器具有很多優(yōu)點(diǎn),光纖耦合可以實(shí)現(xiàn)激光的柔性傳輸,利用光纖的均化作用可以將半導(dǎo)體激光轉(zhuǎn)化為圓形均勻分布的光場(chǎng)。由于半導(dǎo)體激光器自身結(jié)構(gòu)原因?qū)е鹿鈭?chǎng)分布不均勻、光束質(zhì)量差、功率密度低等缺點(diǎn),限制了半導(dǎo)體激光器的應(yīng)用。為解決這個(gè)問(wèn)題,本論文通過(guò)光束整形技術(shù)提高半導(dǎo)體激光的光束質(zhì)量;通過(guò)空間合束、偏振合束、波長(zhǎng)合束等技術(shù)提高功率以及功率密度;利用光纖耦合技術(shù)均化光場(chǎng)并實(shí)現(xiàn)激光的柔性輸出。本論文的研究目標(biāo)是得到高功率、高光束質(zhì)量和高光纖耦合效率的光纖耦合半導(dǎo)體激光器。通過(guò)對(duì)國(guó)內(nèi)外光纖耦合半導(dǎo)體激光模塊的調(diào)研和總結(jié),在充分理解半導(dǎo)體激光器的光束整形技術(shù)和合束相關(guān)技術(shù)的基礎(chǔ)上,針對(duì)半導(dǎo)體標(biāo)準(zhǔn)陣列,本論文主要研究?jī)?nèi)容和成果如下:(1)分析半導(dǎo)體激光器光纖耦合的國(guó)內(nèi)外現(xiàn)狀和應(yīng)用背景;對(duì)半導(dǎo)體激光器的電學(xué)特性和光學(xué)特性進(jìn)行了研究。(2)將波長(zhǎng)為976 nm連續(xù)工作的5個(gè)半導(dǎo)體標(biāo)準(zhǔn)陣列,通過(guò)對(duì)快軸進(jìn)行準(zhǔn)直和快慢軸光束旋轉(zhuǎn)的方式進(jìn)行光束整形,準(zhǔn)直后進(jìn)行空間合束,經(jīng)耦合透鏡聚焦,耦合入芯徑400μm、數(shù)值孔徑0.22的光纖。測(cè)量結(jié)果顯示:光纖的出光功率最大可達(dá)到244.6 W,光纖耦合效率大于93.6%。(3)針對(duì)波長(zhǎng)為938nm的10個(gè)半導(dǎo)體標(biāo)準(zhǔn)陣列,采用光束整形技術(shù)、空間合束、偏振合束和光纖耦合等技術(shù),最終耦合入芯徑400μm、數(shù)值孔徑0.22的光纖,研制出一種光纖輸出功率518 W,光纖耦合效率為95%的半導(dǎo)體激光模塊。(4)設(shè)計(jì)了緊湊型空間合束模塊結(jié)構(gòu),實(shí)現(xiàn)了兩個(gè)方向光束質(zhì)量均衡的空間合束,利用4個(gè)模塊經(jīng)過(guò)偏振合束、波長(zhǎng)合束后,得到高功率、高效率的半導(dǎo)體激光器,并研發(fā)出樣機(jī)。輸出光耦合入芯徑為400μm,數(shù)值孔徑0.22的光纖,光纖耦合輸出最高功率1070 W,耦合效率96.3%,電光轉(zhuǎn)換效率43%。
[Abstract]:In laser processing, the efficiency of electro-optic conversion is high, the unit energy consumption is low, and the processing cost can be reduced. Semiconductor lasers can meet the requirements of this aspect and are more and more used in industrial processing, such as laser cladding, heat treatment, etc. Surface hardening, etc The fiber coupling semiconductor laser has many advantages. The fiber coupling can realize the flexible transmission of the laser. By using the homogenization of the fiber, the semiconductor laser can be transformed into a circular and uniform distribution of light field. The application of semiconductor laser is limited because of its own structure, such as uneven light field distribution, poor beam quality and low power density. In order to solve this problem, the beam quality of semiconductor laser is improved by beam shaping technology, and the power and power density are improved by space beam, polarization beam, wavelength beam and so on. The fiber coupling technique is used to homogenize the light field and to realize the flexible output of the laser. The aim of this thesis is to obtain fiber coupled semiconductor lasers with high power, high beam quality and high fiber coupling efficiency. Based on the investigation and summary of optical fiber coupled semiconductor laser modules at home and abroad, and on the basis of fully understanding the beam shaping technology and beam correlation technology of semiconductor lasers, aiming at semiconductor standard arrays, The main contents and results of this thesis are as follows: (1) the current situation and application background of fiber coupling in semiconductor lasers are analyzed. In this paper, the electrical and optical properties of semiconductor lasers are studied. (2) five semiconductor standard arrays with a wavelength of 976 nm are used for beam shaping by collimating the fast axis and rotating the fast and slow axis beams. After collimation, the optical fiber with a diameter of 400 渭 m and a numerical aperture of 0.22 was focused by a coupling lens. The measurement results show that the maximum output power of the optical fiber can reach 244.6 W, and the coupling efficiency of the fiber is greater than 93.60.The optical fiber coupling efficiency is greater than 93.60.The optical fiber coupling technology is used for 10 semiconductor standard arrays with wavelength 938nm, such as beam shaping technology, spatial beam combination, polarization beam coupling and fiber coupling, etc. Finally, a semiconductor laser module, which has the output power of 518W and the coupling efficiency of 95%, has been developed by coupling the optical fiber with a core diameter of 400 渭 m and a numerical aperture of 0.22.) the compact spatial beam module structure has been designed. In this paper, two direction beam quality equalization space beam is realized. The semiconductor laser with high power and high efficiency is obtained by using four modules after polarization beam and wavelength beam combination, and a prototype is developed. The optical fiber with a core diameter of 400 渭 m and a numerical aperture of 0.22 has a maximum output power of 1070 W, a coupling efficiency of 96.3W and an electro-optic conversion efficiency of 43W.
【學(xué)位授予單位】：北京工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TN248.4

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相關(guān)期刊論文 前1條

1 許孝芳,李麗娜,吳金輝,尹鴻賀,王立軍;33W半導(dǎo)體激光器列陣光纖耦合模塊[J];光電子·激光;2005年09期

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本文編號(hào)：1987185