共查询到19条相似文献,搜索用时 125 毫秒
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通过传输矩阵模型,理论研究了不同端面反射的存在对取样光栅分布Bragg反射(SG-DBR)镜以及集成半导体放大器(SOA)的SG-DBR镜反射谱的影响,进而研究了端面反射的存在对SG-DBR激光器以及集成SOA的激光器模式的影响,结果表明,端面反射的存在会使取样光栅的各级反射峰由1个分裂为2个甚至多个,并可能使边峰的强度高过零级峰,这将会严重恶化SG-DBR激光器及其集成SOA的激光器模式特性和调谐特性。理论分析与实验结果基本吻合。当端面的反射率小于0.01时,端面反射对于SG-DBR激光器的影响可以忽略不计。 相似文献
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对于大容量的波分复用(WDM)光通信系统,精确控制波长及波长间隔是系统应用的关键.而对于信道间隔为 0.8 nm的 WDM系统,要求波长与 ITU的标准价差小于±0.01 nm.因此,波长可精确调谐的单模激光器成为必需.本文介绍了我们制作的两种波长可调谐的单模激光器:可调谐DFB激光器和可调谐DBR激光器.其中,可调谐DFB激光器采用的是热调谐方式,即改变DFB激光器的工作温度,实现了波长向长波方向连续移动 2.2 nm;可调谐 DBR激光器采用的是注入电流的方式,实现了 6.5 nm的准连续调谐. 可调… 相似文献
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波长可调谐激光器技术特点
波长可调谐激光器可任意控制信道波长,方便准确地控制频道间隔。可调谐激光器主要由具有有源增益区和谐振腔的激光器、改变和选择波长的可调装置、稳定输出波长装置三个基本部分组成。可调谐激光器有电流调谐、温度调谐、包括微电子机械系统机械(MEMS)的机械调谐三种基本技术,一般采用其中的一种或两种技术。表1为几种可调谐激光器技术与特点比较。 相似文献
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《大气与环境光学学报》1999,(4)
可调谐二极管激光器 近五年来,可调谐外腔二极管激光器已经从研究工具发展成为一个广泛应用的关键性器件。由于波分复用(WDM)系统设计者提高了系统中的通道数量,已经从激光器中获得增大了的波长控制能力。由于光谱学系统的发展,使用者们需要更多的波长来研究不同的分子吸收,商业应用需要更高的可靠性。可调谐外腔二极管激光器获得成功是因为它面对这些挑战,通信、光谱学和地质学的发展对激光器的需求促进了产品更新换代。由于波分复用系统的通道间隙从200到50GHz,甚至更窄,因而外腔二极管激光器的波长控制只能步进。… 相似文献
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提出了一种利用射频控制信号对多波长光纤激光器输出的多波长信号进行整体精密调谐的方法。通过在多波长光纤激光器腔外放置射频信号控制的单边带(SSB)调制器,实现了65个波长整体精密调谐。通过改变射频驱动信号频率,可以实现多波长整体在150MHz~12GHz范围内的任意调谐,最低对应1.2pm的调谐量。且调谐步长由射频控制信号决定,可精确到1Hz。多波长整体调谐前后,多波长间隔始终保持50GHz不变,各波长的边模抑制比(SMSR)均可达到20dB。 相似文献
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《Electron Device Letters, IEEE》2009,30(4):353-355
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This paper presents rapid, precise, and stable control of optical frequency for sampled-grating distributed Bragg reflector (SG-DBR) laser diode (LD) using a Z-cut quartz etalon supported at the middle point. The optical frequency of SG-DBR LD was controlled by the mode-hop-free three-electrode control method. As a result, stable mode operation and wide continuous tuning range without mode hopping have been realized. A 0.2-ms optical frequency tuning speed with a 4.35-THz tuning range and a 130-MHz control error of the optical frequency was demonstrated. A 1.1-MHz Allan deviation was reached at an integration time of 12 times 103 s. 相似文献
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《Lightwave Technology, Journal of》2010,28(4):526-538
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Widely Tunable Separate Absorption and Modulation Wavelength Converter With Integrated Microwave Termination 总被引:1,自引:0,他引:1
Dummer M.M. Sysak M.N. Tauke-Pedretti A. Raring J.W. Klamkin J. Coldren L.A. 《Lightwave Technology, Journal of》2008,26(8):938-944
A widely tunable wavelength converter utilizing a separate absorption and modulation configuration and only dc bias connections is demonstrated. The device integrates an SG-DBR laser with a traveling-wave electroabsorption modulator and an optically pre-amplified receiver and introduces a simplified bias scheme by the inclusion of passive resistor and capacitor circuit elements. We discuss a the design of these passive elements and their compatibility with fabrication of photonic integrated circuits. The device demonstrates over 12 GHz optical bandwidth and error free 10 Gb/s wavelength conversion is achieved with less than 2.5 dB power penalty over 25 nm of output tuning. 相似文献
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Because the sampled grating distributed Bragg reflector (SG-DBR) laser is among the most attractive sources for wavelength division multiplexing (WDM) systems, it is important and necessary to investigate its wavelength switching characteristics. This behavior will set the capability limits for reallocation in wavelength-routed optical networks. In this paper, that mode competition plays an important role in the wavelength switching dynamics of DBR-type tunable lasers is confirmed experimentally. By using a time-resolved spectrum technique, the loss-dependent mode competition behavior has been directly observed, for the first time, from measurements of wavelength switching on an SG-DBR laser 相似文献
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《Components and Packaging Technologies, IEEE Transactions on》2005,28(4):651-657
We investigate thermal effects in widely tunable laser transmitters based on an integrated single chip design. The chip contains a sampled-grating distributed Bragg reflector (SG-DBR) laser monolithically integrated with a semiconductor optical amplifier (SOA) and an electroabsorption modulator (EAM). The thermal impedance of the ridge structure is evaluated through simulation and experiment, and thermal crosstalk between sections is examined. Heating of the mirrors by neighboring sections is found to result in unintentional offsets in wavelength tuning. Thermal effects in the EAM are examined in depth. A positive feedback mechanism causes local temperature rise at the modulator input, with the potential to trigger catastrophic thermal runaway. A self-consistent finite-element model is developed to simulate the EAM temperature profile and device performance. This model is used to optimize the device, resulting in integrated EAMs that achieve a dissipated power limit in excess of 300mW. 相似文献