波长(频率)可调谐半导体激光器

波长或频率可调谐的半导体激光器在光通信等实际应用领域中有着重要而广泛的应用。文章立足于实际应用,从谐振腔的结构出发,以调谐机理为研究对象,对可调谐半导体激光器进行了分类研究,并对它们的调谐特性做了总结     

可调谐半导体激光器的发展

1 可调谐半导体激光器的研究进展 自20世纪80年代初单模半导体激光器研制成功后,波长可调谐的半导体激光器就成为广泛研究的重要课题.通信系统的需求一直是可调谐半导体激光器研发的主要驱动力所在.     

光网络中的可调谐激光器的研究

随着光网络的不断发展，可调谐激光器显现出越来越重要的作用。本文主要介绍了各种不同类型的可调谐激光器，主要包括可调谐半导体激光器和可调谐光纤激光器，并对可调谐激光器的发展做了简单的介绍。     

用温度控制可调谐激光器波长稳定的方法

介绍了可调谐半导体激光器在光通信领域的应用及其工作原理.重点讨论了SSG-DBR可调谐激光器的结构、工作原理,以及波长稳定控制方法.提出了一种新的基于温度反馈的波长稳定控制方法,使可调谐激光器的输出在20℃～70℃范围内的波长漂移小于1nm,边模抑制比优于5dB.该方法简单、可靠,将会对可调谐激光器在全光网络中的应用起到一定的推动作用.     

可调谐外腔半导体激光器研究进展

可调谐外腔半导体激光器具有线宽窄、调谐范围宽、单模输出、输出功率高等优良特性,在白光干涉测量技术、波分复用系统、相干光通信、光纤传感等领域有着广泛的应用。文章首先介绍了可调谐外腔半导体激光器的基本原理以及各种典型外腔结构的调谐机理,然后根据外腔结构阐述了各种可调谐外腔半导体激光器的最新研究进展,分析了不同外腔结构的优缺点,最后对可调谐外腔半导体激光器的不足进行了总结,展望了其未来发展趋势。     

高速率光纤通信系统激光器技术

文章介绍了适用于高速率光纤通信系统的可调谐激光器技术,对比了常见可调谐半导体激光器的技术发展及特点,介绍了目前较为前沿的可调谐光纤激光器技术,指出了可调谐光纤激光器对实现全光网的重要作用和巨大的发展潜力。     

用于DWDM光纤通信的波长可调激光器

目前光纤通信系统所用的激光器都是固定波长激光器,这种激光器一旦制作好,波长便难以改变。而在密集波分复用(DWDM)系统中需要若干不同波长的激光二极管(LD)作光源,这样便需要制作若干个不同波长的固定波长激光器,不仅工艺制作困难,而且成本也增加。如能制作出在较宽波长范围内其波长可以任意调节的LD,便可采用同一结构制作出满足一系列波长要求的光源。目前,可调波长激光器已成为激光二极管研发的热点。按其波长可调激光器的工作原理可分为机械、电和热调谐,若按其结构可分为外腔型半导体激光器、电调谐半导体激光器和热调谐半导体激光器。     

集成式可调谐半导体激光器及其封装

为适应于光通信网络发展的需要,业界已开发出可调谐半导体激光器,光功能的高效率集成封装可提高耦合效率,还可减少成本。文章介绍了几种集成式可调谐半导体激光器及其封装技术。指出可调谐激光器的发展趋势是集成化和模块化。     

半导体激光器的发展

1 可调谐半导体激光器的研究进展 自20世纪80年代初单模半导体激光器研制成功后，波长可调谐的半导体激光器就成为广泛研究的重要课题。通信系统的需求一直是可调谐半导体激光器研发的主要驱动力所在。在多信道相干光通信系统中，为方便接收机进行信道选择，作为本地振荡器的半导体激光器最好具有一定的波长调谐能力；此外，在窄频率间隔的多信道系统中，信道的有效分配也需要发射光源可以进行小范围的波长调谐。     

半导体激光器的波长调谐和波长稳定技术

波长调谐和波长稳定的半导体激光器在光通信等实际应用领域有着重要而广泛的应用．本文评述了半导体激光器的波长调谐和波长稳定技术的几种方案，分析了其波长调谐和波长稳定的机理．     

光通信系统中新型可调谐半导体激光器的设计

为了适应当前光通信系统对波长可调谐激光器的需求,提出用游标效应来实现波长可调谐的激光器,设计了一种功率稳定且频率可调的三段式开槽法布里-珀罗结构可调谐半导体激光器,给出了系统结构的设计原理,并进行了理论分析和实验验证。取得了三段式开槽法布里-珀罗结构可调谐半导体激光器激射谱叠加图数据,利用光纤延迟自外差法测量激光器线宽,对比了3种不同激光器的线宽测量曲线。结果表明,基于游标效应设计的新型开槽法布里-珀罗可调谐半导体激光器波长调谐机制简单方便,且具有很好的单模性和信道切换能力。该研究在未来的光通信领域中具有一定的应用价值和实际意义。     

Wide-range tunable semiconductor lasers using asymmetric dualquantum wells

Using asymmetric dual quantum wells for the laser material, the semiconductor lasers are broadly tunable. In a grating coupled ring cavity, the semiconductor laser is continuously tunable from 766 to 856 nm using a 400-μm semiconductor laser amplifier in the cavity. This letter also demonstrates that the grating coupled ring cavity could well eliminate the amplified stimulated emission noise and about 40-dB amplified spontaneous emission (ASE) suppression ratio is obtained over the entire tuning range     

基于硅光可调25 Gbit/s光发射组件的研究

随着光通信技术的快速发展,光纤传输的容量呈几何式增长,对密集波分复用(DWDM)网络系统的管理和调度灵活性要求也在不断提高.波长可调模块可以满足网络管理灵活的要求,在波分复用(WDM)系统和5 G网络中将会有广泛应用.而作为模块内的核心元件,可调激光器的研究就显得尤为重要.文章介绍了一种可调激光器和硅光调制器芯片混合集...     

Design of widely tunable semiconductor three-branch lasers

We describe the design and operating principles of the new, widely tunable, three-branch semiconductor Y3-lasers, which we have demonstrated recently. This multibranch tunable laser structure is formed by a cascade of Y-junctions and uses a geometrical tuning leverage to achieve wide-range discrete frequency tuning. Y3-lasers have demonstrated experimentally a tuning range of 45 nm (5.6 THz) and access to 50 frequency channels, with potential access to more than a 100 channels. Among the important issues discussed in this paper are the Y3-laser structure, mode selection of the Y3-laser filter, laser side-mode suppression, number of accessible channels, tuning range, and the tuning mechanism of the Y3-laser. A specific design example is also presented. The simplicity of Y3-laser fabrication and the powerful digital channel-access control make these lasers important electronically-tunable sources for multichannel wavelength-division-multiplexed (WDM) optical communication networks     

Tunable semiconductor lasers: a tutorial

Tunable semiconductor lasers have been listed in numerous critical technology lists for future optical communication and sensing systems. This paper summarizes a tutorial that was given at OFC '03. It includes some discussion of why tunable lasers might be beneficial, an outline of basic tuning mechanisms, some examples of tunable lasers that have been commercialized, and a discussion of control techniques. More extensive data is given for the widely-tunable sampled-grating distributed-Bragg-reflector (SGDBR) type of laser, including data for such lasers integrated monolithically with modulators to form complete transmitter front ends. A summary of reliability data for the SGDBR laser is also given. It is concluded that tunable lasers can reduce operational costs, that full-band tunability is desirable for many applications, that monolithic integration offers the most potential for reducing size, weight, power and cost, and that sufficient reliability for system insertion has been demonstrated.     

基于光栅光阀可调谐半导体激光器外腔结构的设计研究

目的:提出利用光栅光阀(GLV)来精密调节光栅外腔半导体激光器输出波束的新方法。方法:这种基于光栅光阀的可调谐外腔半导体激光器的结构使光栅光阀与闪耀光栅形成了共焦结构,便于使被选择的波束可以原路返回,经过在谐振腔中振荡,最后输出。结果:这种基于光栅光阀结构的可调谐外腔半导体激光器可以任意控制输出或者被过滤掉的相应波束的数量。结论:利用光栅光阀的特性,这种可调谐外腔半导体激光器能有效地实现激光输出波束的精密调谐,同时也降低了调谐的机械难度。     

可调谐激光器在光通信网络中的应用

可调谐激光器技术的日益成熟,使其在光通信网络中的应用逐渐增加。文中对可调谐激光器研究现状进行了探讨,并详细分析了MEMS可调谐激光器优势特点。同时,文中对可调谐激光器在无源光网络、光突发交换网络和光标记交换网络中的应用进行了重点阐述。并在文章最后对可调谐激光器的技术及在光通信网络中的应用前景进行了预测。     

Electrooptically tuned external-cavity CW semiconductor laser and FM optical communications

We report the operation of an external-cavity CW double-heterojunction GaAs injection laser that can be electrooptically tuned rapidly over a large spectral range (∼ 50 Å) and experiments demonstrating the feasibility of FM optical communications using electronically tunable semiconductor lasers and CW and mode-locked dye lasers. An experiment on binary pulse-code FM optical communication is also reported and discussed.     

Multiwavelength Mode-Locked Fiber-Ring Laser Based on Reflective Semiconductor Optical Amplifiers

An active multiwavelength mode-locked fiber ring laser is demonstrated by exploiting cross-gain modulation in a reflective semiconductor optical amplifier. A length of dispersion-compensation fiber is incorporated in the ring cavity to enhance the multiwavelength performance. Simultaneous tunable triple-wavelength mode-locking is implemented with the pulse repetition of 10 GHz and wavelength spacing of 1.12 nm. The results provide an effective approach to fulfill all-optical clock recovery and data pattern conversion in multiwavelength for future optical communication systems.