激光器驱动电路中英文翻译.docx
《激光器驱动电路中英文翻译.docx》由会员分享,可在线阅读,更多相关《激光器驱动电路中英文翻译.docx(9页珍藏版)》请在咨信网上搜索。
1、中文2540字Laser driver circuitSmall changes will directly semiconductor laser drive current to the output intensity fluctuation. To stabilize the output power semiconductor laser, Voltage negative feedback principle to design a constant current driving circuit comprises a soft starting and current limi
2、ting protection circuit based on; At the same time, according to the need of the light source is modulated to eliminate the influence of background light and, integrated laser modulation circuit comprises a crystal oscillation circuit and divider circuit design. Making the specific circuit and compl
3、ete the relevant experimental. The experimental results show that the circuit can provide a driving current of high stability, Current stability up to 0.05%; Soft start and current-limiting protection circuit can protect the semiconductor laser and enhance the impact capability. Modulation circuit g
4、enerates a carrier signal needed for laser diode modulation and direct to complete the output light modulation, The switch can be conveniently realized from 256Hz to 512kHz range of 12 kinds of commonly used modulation frequency selection.Semiconductor laser with its excellent characteristics, high
5、efficiency, simple structure, small is widely used in scientific research, national defense, medical, and other areas of processing, its drive technology becomes more and more important. Semiconductor laser is the ideal electron - photon direct conversion devices, quantum efficiency is very high, th
6、e current small changes will lead to a great change, the output light intensity of the therefore, semiconductor laser drive current requirements is very high. Driving technology of semiconductor laser usually adopts constant current drive mode, this work, through the principle of negative feedback c
7、ontrol loop, directly provide the effective control of the drive current. In addition, the transient current or voltage spikes, and overcurrent, overvoltage will damage the semiconductor laser drive circuit, therefore should be considered in the protection circuit against electric shock measures and
8、 special.In some applications, DC semiconductor lasers produce DC drive light in the measurement process is vulnerable to interference from ambient light slow change, which could not be separated from the environment light required DC optical signal, the signal-to-noise ratio is too small, so to car
9、ry on the modulation. When the high-speed modulated semiconductor lasers, there will be dynamic characteristics is complex, such as the relaxation oscillation, since the pulse and multi-pulse phenomena. In this paper, experiments were conducted to study the characteristics of low frequency modulatio
10、n. Semiconductor laser output is stable, and can be directly modulated, it has been widely applied in optical system, is the preferred source sensor system. This paper describes the design of a high stability driving current, modulation, simple operation and low cost driving circuit for the light so
11、urce of optical fiber systems.In this paper, the design of driving the semiconductor laser modulation circuit composed of four parts, including constant current circuit, a soft start, current limit protection and modulation signal generating circuit. The constant current circuit to generate a high s
12、table drive current. Soft start is the role of eliminating surge may be present in the circuit, to prevent the harm of surge for laser. To avoid damage due to overcurrent caused by semiconductor laser can not be restored, then adding current-limiting protection in a driver circuit. Circuit to realiz
13、e the modulation and frequency can be adjusted to generate a modulated signal. The constant current circuit is shown in figure 1, The in-phase end voltage reference Vr into A1 op amp, the operational control amplifier conducting level, and thus to obtain the corresponding output current. The output
14、current generated by sampling voltage sampling resistor Rs, the sampling voltage is amplified as the inverting input voltage feedback voltage feedback amplifier A1, and voltage and the in-phase input end of comparison, Q2 to adjust the output voltage through the triode, adjustment and output current
15、 of semiconductor lasers, so that the whole closed-loop feedback system in the dynamic balance.Figure 1 Constant current mapBecause the switch instantaneous in power supply generates a voltage, current surge, as well as the surge interference effects are likely to cause the breakdown and the damage
16、of the semiconductor laser, and therefore must be in the design of soft start circuit drive laser, namely the use of the charge and discharge of RC circuit, delay time, the specific circuit as shown in Figure 2 as shown in. Switch S1 is closed, the current through the resistor R1 and capacitor C3 to
17、 charge, the base electrode of the triode Q voltage gradually rises. As the capacitor charging and the conduction of the triode, output voltage Vo is achieved from 0 to the maximum rise slowly, until the capacitor charge saturation, the voltage and current stabilizing. When the power supply is disco
18、nnected, the process of reverse, so as to realize the current and voltage decreases slowly.Figure 2 Soft start circuit diagramLaser soft start time and the charging capacitor and the corresponding resistance, when the capacitor charging tends to saturation, the output voltage soft start circuit can
19、achieve maximum. Power supply voltage is V I, the capacitor voltage is Vo, the capacitor charging formula:According to this formula can calculate the electric charge and discharge time.Semiconductor laser with other devices, have normal working current, if the current exceeds this range, the laser w
20、ill be damaged, therefore must restrict current laser in the set range.Emitter voltage transistor Q2 as the feedback voltage terminal phase in A3 op amp, when the feedback voltage is less than the limit voltage V, A3 op amp output low level, the transistor Q1 is turned on, this time by a triode Q2 o
21、utput voltage feedback voltage is greater than the limit; when the voltage of V, A3 op amp output high, triode Q1 cutoff, this limits the triode Q2 emission increases very current, and is limited to a specific value. So even if the current caused by Vr control voltage exceeds the set value, the trio
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- 激光器 驱动 电路 中英文 翻译
1、咨信平台为文档C2C交易模式,即用户上传的文档直接被用户下载,收益归上传人(含作者)所有;本站仅是提供信息存储空间和展示预览,仅对用户上传内容的表现方式做保护处理,对上载内容不做任何修改或编辑。所展示的作品文档包括内容和图片全部来源于网络用户和作者上传投稿,我们不确定上传用户享有完全著作权,根据《信息网络传播权保护条例》,如果侵犯了您的版权、权益或隐私,请联系我们,核实后会尽快下架及时删除,并可随时和客服了解处理情况,尊重保护知识产权我们共同努力。
2、文档的总页数、文档格式和文档大小以系统显示为准(内容中显示的页数不一定正确),网站客服只以系统显示的页数、文件格式、文档大小作为仲裁依据,平台无法对文档的真实性、完整性、权威性、准确性、专业性及其观点立场做任何保证或承诺,下载前须认真查看,确认无误后再购买,务必慎重购买;若有违法违纪将进行移交司法处理,若涉侵权平台将进行基本处罚并下架。
3、本站所有内容均由用户上传,付费前请自行鉴别,如您付费,意味着您已接受本站规则且自行承担风险,本站不进行额外附加服务,虚拟产品一经售出概不退款(未进行购买下载可退充值款),文档一经付费(服务费)、不意味着购买了该文档的版权,仅供个人/单位学习、研究之用,不得用于商业用途,未经授权,严禁复制、发行、汇编、翻译或者网络传播等,侵权必究。
4、如你看到网页展示的文档有www.zixin.com.cn水印,是因预览和防盗链等技术需要对页面进行转换压缩成图而已,我们并不对上传的文档进行任何编辑或修改,文档下载后都不会有水印标识(原文档上传前个别存留的除外),下载后原文更清晰;试题试卷类文档,如果标题没有明确说明有答案则都视为没有答案,请知晓;PPT和DOC文档可被视为“模板”,允许上传人保留章节、目录结构的情况下删减部份的内容;PDF文档不管是原文档转换或图片扫描而得,本站不作要求视为允许,下载前自行私信或留言给上传者【快乐****生活】。
5、本文档所展示的图片、画像、字体、音乐的版权可能需版权方额外授权,请谨慎使用;网站提供的党政主题相关内容(国旗、国徽、党徽--等)目的在于配合国家政策宣传,仅限个人学习分享使用,禁止用于任何广告和商用目的。
6、文档遇到问题,请及时私信或留言给本站上传会员【快乐****生活】,需本站解决可联系【 微信客服】、【 QQ客服】,若有其他问题请点击或扫码反馈【 服务填表】;文档侵犯商业秘密、侵犯著作权、侵犯人身权等,请点击“【 版权申诉】”(推荐),意见反馈和侵权处理邮箱:1219186828@qq.com;也可以拔打客服电话:4008-655-100;投诉/维权电话:4009-655-100。