半导体激光器特性测试实验

半导体激光器特性测试实验 太原理工大学现代科技学院 光纤通信 课程 实验报告 专业班级 学 号 姓 名 指导教师 coefficient not greater than 1.3; High efficiency: control 1 hour travel time between any two points within the various groups within the area up to half an hour, 1-hour access to the airport, 45min reached the city's main traffic hub, external highway for half an hour with the main channels connecting bus 1.5 hours between any two groups of core areas; Intensive: 2030 transit share rate of around 35%, 2050 bus sharing rate of 45% per cent. 3rd chapter, Yibin city, traffic situation and General ... 3.1.1 city traffic status 1, external transport passenger and cargo traffic in Yibin city, traffic at the present main railway, highway, waterway and air four modes of passenger and freight transport, thereand cultural heritage, highlighting the cultural taste and shape characteristics of the city in Yibin. According to forecasts, vision 2050 population will reach 2.1 million people in the center of Yibin city, urban land is around 210km2. Figure 2.6-1 2050 figure 2.7 land use planning in the Center City, Yibin city development requires the development of bus rapid transit construction and socio-economic development trends, Yibin city coordination, supporting urban space layout and infrastructure networks, transport organized, internal and external traffic hub smoothly linking, realizing sustainable development of Yibin city integrated transportation system. Concrete can be summarized as, accessible, efficient, intensive and sustainable. Accessibility: Central built-up area road network density of about 7.0km/km2; bus line density of 3-4 km/km2, bus transfer 实验名称 半导体激光器P-I特性测试实验 同组人 ………专业班级 学号 2 姓名 成绩 …… ……一、实验目的: …… 1.学习半导体激光器发光原理和光纤通信中激光光源工作原理 …… 2.了解半导体激光器平均输出光功率与注入驱动电流的关系 …… 3.掌握半导体激光器P(平均发送光功率)-I(注入电流)曲线的测试方法 …装…二、实验仪器 …… 1.ZYE4301G型光纤通信原理实验箱 1台 …… 2.光功率计 1台 …… 3.FC/PC-FC/PC单模光跳线 1根 ……… 4.万用 表 关于同志近三年现实表现材料材料类招标技术评分表图表与交易pdf视力表打印pdf用图表说话 pdf 1台 …… 5.连接导线 20根 ……三、实验原理 …订 半导体激光二极管(LD)或简称半导体激光器，它通过受激辐射发光，(处于高能级E2的电子在光……场的感应下发射一个和感应光子一模一样的光子，而跃迁到低能级E1，这个过程称为光的受激辐射，所谓………一模一样，是指发射光子和感应光子不仅频率相同，而且相位、偏振方向和传播方向都相同，它和感应光……子是相干的。)是一种阈值器件。由于受激辐射与自发辐射的本质不同，导致了半导体激光器不仅能产生高……功率(?10mW)辐射，而且输出光发散角窄(垂直发散角为30,50?，水平发散角为0,30?)，与单模……光纤的耦合效率高(约30,,50,)，辐射光谱线窄(?λ=0.1,1.Onm)，适用于高比特工作，载流子复合………寿命短，能进行高速信号(>20GHz)直接调制，非常适合于作高速长距离光纤通信系统的光源。 …… P-I特性是选择半导体激光器的重要依据。在选择时，应选阈值电流Ith，尽可能小，Ith对应P值小，线…而且没有扭折点的半导体激光器，这样的激光器工作电流小，工作稳定性高，消光比大，而且不易产生光……信号失真。并且要求P-I曲线的斜率适当。斜率太小，则要求驱动信号太大，给驱动电路带来麻烦;斜率太…… 大，则会出现光反射噪声及使自动光功率控制环路调整困难。半导体激光器具有高功率密度和极高量子效………率的特点，微小的电流变化会导致光功率输出变化，是光纤通信中最重要的一种光源，半导体激光器可以……看作为一种光学振荡器，要形成光的振荡，就必须要有光放大机制，也即激活介质处于粒子数反转分布，……而且产生的增益足以抵消所有的损耗。将开始出现净增益的条件称为阈值条件。一般用注入电流值来标定 …… … coefficient not greater than 1.3; High efficiency: control 1 hour travel time between any two points within the various groups within the area up to half an hour, 1-hour access to the airport, 45min reached the city's main traffic hub, external highway for half an hour with the main channels connecting bus 1.5 hours between any two groups of core areas; Intensive: 2030 transit share rate of around 35%, 2050 bus sharing rate of 45% per cent. 3rd chapter, Yibin city, traffic situation and General ... 3.1.1 city traffic status 1, external transport passenger and cargo traffic in Yibin city, traffic at the present main railway, highway, waterway and air four modes of passenger and freight transport, thereand cultural heritage, highlighting the cultural taste and shape characteristics of the city in Yibin. According to forecasts, vision 2050 population will reach 2.1 million people in the center of Yibin city, urban land is around 210km2. Figure 2.6-1 2050 figure 2.7 land use planning in the Center City, Yibin city development requires the development of bus rapid transit construction and socio-economic development trends, Yibin city coordination, supporting urban space layout and infrastructure networks, transport organized, internal and external traffic hub smoothly linking, realizing sustainable development of Yibin city integrated transportation system. Concrete can be summarized as, accessible, efficient, intensive and sustainable. Accessibility: Central built-up area road network density of about 7.0km/km2; bus line density of 3-4 km/km2, bus transfer 太原理工大学现代科技学院实验报告 阈值条件，也即阈值电流Ith,当输入电流小于Ith时，其输出光为非相干的荧光，类似于LED发出的光，当电流大于Ith时，输出光为激光，且输入电流和输出光功率成线性关系。该实验就是对该线性关系进行测量，以测试半导体激光器的P-I线性关系。在实验中所用到半导体激光器输出波长为1310nm，带尾纤及FC型接口。半导体激光器作为光纤通信中应用的主要光源，其性能指标直接影响到系统传输数据的质量，因此P-I特性曲线的测试了解激光器性能是非常重要的。半导体激光器驱动电流的确定是通过测量串联在电路中的R110上电压值。电路中的驱动电流在数值上等于R110两端电压与电阻值之比。为了测试更加精确，实验中先用万用表测出R110的精确值，计算得出半导体激光器的驱动电流，然后用光功率计测得一定驱动电流下半导体激光器发出激光的功率，从而完成P-I特性的测试。并可根据P-I特性得出半导体激光器的斜率效率。 P(mW) I thI(mA) 图1-1 LD半导体激光器P-I曲线示意 图 四、实验内容 1.测量半导体激光器输出功率和注入电流，并画出P-I关系曲线。 2.根据P-I特性曲线，找出半导体激光器闭值电流，计算半导体激光器斜率效率。 五、实验步骤 1.将光发模块中的可调电阻W101逆时针旋转到底，使数字驱动电流达到最小值。 2.用万用表测得R110电阻值，找出所测电压与半导体激光器驱动电流之间的关系(V,IR110)。 3.拨动双刀三掷开关，BM1选择到半导体激光器数字驱动，BM2选择到1310。 4.旋开光发端机光纤输出端口(1310nmT)防尘帽，用FC-FC光纤跳线将半导体激光器与光功率计输入端连接起来，并将光功率计测量波长调整到1310nm档。 5.连接导线:将T502与T101连接。 6.连接好实验箱电源，先开交流电源开关，再开直流电源开关，即按下K01，K02(电源模块)，并打开光发模块(K10)和数字信号源(K50)的直流电源。 coefficient not greater than 1.3; High efficiency: control 1 hour travel time between any two points within the various groups within the area up to half an hour, 1-hour access to the airport, 45min reached the city's main traffic hub, external highway for half an hour with the main channels connecting bus 1.5 hours between any two groups of core areas; Intensive: 2030 transit share rate of around 35%, 2050 bus sharing rate of 45% per cent. 3rd chapter, Yibin city, traffic situation and General ... 3.1.1 city traffic status 1, external transport passenger and cargo traffic in Yibin city, traffic at the present main railway, highway, waterway and air four modes of passenger and freight transport, thereand cultural heritage, highlighting the cultural taste and shape characteristics of the city in Yibin. According to forecasts, vision 2050 population will reach 2.1 million people in the center of Yibin city, urban land is around 210km2. Figure 2.6-1 2050 figure 2.7 land use planning in the Center City, Yibin city development requires the development of bus rapid transit construction and socio-economic development trends, Yibin city coordination, supporting urban space layout and infrastructure networks, transport organized, internal and external traffic hub smoothly linking, realizing sustainable development of Yibin city integrated transportation system. Concrete can be summarized as, accessible, efficient, intensive and sustainable. Accessibility: Central built-up area road network density of about 7.0km/km2; bus line density of 3-4 km/km2, bus transfer 7.用万用表测量R110两端电压(红表笔插T103,黑表笔插T104)。 8.慢慢调节电位器W101，使所测得的电压为下表中数值，依次测量对应的光功率值，并将测得的数据填入下表。 9(做完实验后先关闭光发模块电源(K10)，然后依次关掉各直流开关(电源模块)，以及交流电开关。 10.拆下光跳线及光功率计，用防尘帽盖住实验箱半导体激光器光纤输出端口，将实验箱还原。 11(将各仪器设备摆放整齐。 六、实验结果 1(根据实验 记录 混凝土 养护记录下载土方回填监理旁站记录免费下载集备记录下载集备记录下载集备记录下载 数据，算出半导体激光器驱动电流，画出相应的光功率与注入电流的关系曲线。 实验过程中测得R110的阻值为1.3 Ω，根据V=IR ，得电流的大小。 U(mV) 1 2 3 4 5 6 7 8 9 10 12 14 0.617 1.234 1.851 2.469 3.086 3.703 4.320 4.938 5.555 6.172 7.407 8.641 I(mA) P(μW) 0 0.002 0.212 0.823 1.403 2.035 2.598 3.247 3.741 4.310 5.600 6.779 -37.2-29.5-26.3P(dBm) 0 -60.1 -32.12 -27.28 -25.12 -24.66 -23.79 -22.93 -22.10 3 8 0 U(mV) 16 18 20 22 24 26 28 30 32 34 36 38 11.1112.3413.5814.8116.0417.2822.2223.45I(mA) 9.876 18.518 19.753 20.97 1 5 0 4 9 3 2 6 10.2311.3312.5513.9114.7717.4218.0118.79P(μW) 7.992 9.010 15.620 16.380 0 0 0 0 0 0 0 0 -21.2-20.8-20.1-19.1-18.3P(dBm) -19.73 -18.93 -18.01 -17.93 -17.58 -17.33 -17.26 1 1 0 3 9 2.根据所画的P-I特性曲线，找出半导体激光器阈值电流Ith的大小。 coefficient not greater than 1.3; High efficiency: control 1 hour travel time between any two points within the various groups within the area up to half an hour, 1-hour access to the airport, 45min reached the city's main traffic hub, external highway for half an hour with the main channels connecting bus 1.5 hours between any two groups of core areas; Intensive: 2030 transit share rate of around 35%, 2050 bus sharing rate of 45% per cent. 3rd chapter, Yibin city, traffic situation and General ... 3.1.1 city traffic status 1, external transport passenger and cargo traffic in Yibin city, traffic at the present main railway, highway, waterway and air four modes of passenger and freight transport, thereand cultural heritage, highlighting the cultural taste and shape characteristics of the city in Yibin. According to forecasts, vision 2050 population will reach 2.1 million people in the center of Yibin city, urban land is around 210km2. Figure 2.6-1 2050 figure 2.7 land use planning in the Center City, Yibin city development requires the development of bus rapid transit construction and socio-economic development trends, Yibin city coordination, supporting urban space layout and infrastructure networks, transport organized, internal and external traffic hub smoothly linking, realizing sustainable development of Yibin city integrated transportation system. Concrete can be summarized as, accessible, efficient, intensive and sustainable. Accessibility: Central built-up area road network density of about 7.0km/km2; bus line density of 3-4 km/km2, bus transfer 太原理工大学现代科技学院实验报告 3.根据P-I特性曲线，求出半导体激光器的斜率效率。 七、思考题 1(试说明半导体激光器发光工作原理。 结注入电流，实现粒子数反转分布，产 答:半导体激光器发光工作原理:半导体激光器是向半导体PN 生受激辐射，利用谐振腔的正反馈，实现光放大而产生激光震荡。 2.环境温度的改变对半导体激光器P-1特性有何影响, 答:激光器的阈值电流随温度升高而增大，外围分子量效率随温度升高而减小，温度升高时，电流增大，外围分子量效率减小，输出光功率明显下降。 3.分析以半导体激光器为光源的光纤通信系统中，半导体激光器P-1特性对系统传输性能的影响。 答:P-I特性是选择半导体激光器的重要依据。在选择时，应选阈值电流Ith尽可能小，对应P值小，而且没有扭折点的半导体激光器，这样的激光器工作电流小，工作稳定性高，消光比大，而且不易产生光信号失真。并且要求P-I曲线的斜率适当。斜率太小，则要求驱动信号太大，给驱动电路带来麻烦;斜率太大，则会出现光反射噪声及使自动光功率控制环路调整困难。 coefficient not greater than 1.3; High efficiency: control 1 hour travel time between any two points within the various groups within the area up to half an hour, 1-hour access to the airport, 45min reached the city's main traffic hub, external highway for half an hour with the main channels connecting bus 1.5 hours between any two groups of core areas; Intensive: 2030 transit share rate of around 35%, 2050 bus sharing rate of 45% per cent. 3rd chapter, Yibin city, traffic situation and General ... 3.1.1 city traffic status 1, external transport passenger and cargo traffic in Yibin city, traffic at the present main railway, highway, waterway and air four modes of passenger and freight transport, thereand cultural heritage, highlighting the cultural taste and shape characteristics of the city in Yibin. According to forecasts, vision 2050 population will reach 2.1 million people in the center of Yibin city, urban land is around 210km2. Figure 2.6-1 2050 figure 2.7 land use planning in the Center City, Yibin city development requires the development of bus rapid transit construction and socio-economic development trends, Yibin city coordination, supporting urban space layout and infrastructure networks, transport organized, internal and external traffic hub smoothly linking, realizing sustainable development of Yibin city integrated transportation system. Concrete can be summarized as, accessible, efficient, intensive and sustainable. Accessibility: Central built-up area road network density of about 7.0km/km2; bus line density of 3-4 km/km2, bus transfer