The direct modulation bandwidth of widely tunable DBR laser diodes

Conference Digest. 2000 IEEE 17th International Semiconductor Laser Conference. (Cat. No.00CH37092) Pub Date : 2000-09-25 DOI:10.1109/ISLC.2000.882301

G. Morthier, G. Sarlet, R. Baets, H. Ishii, Y. Yoshikuni

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引用次数: 5

Abstract

Widely tunable laser diodes are currently regarded as promising light sources for WDM communication systems in which they can economically be used as spare transmitters. Their functionality could however also be useful in a number of new system concepts that are currently under investigation. For some of these new system concepts, it is relevant to know up to which bit rate the widely tunable laser diodes could be directly modulated. We have studied the direct modulation properties of 3 types of widely tunable laser diodes: the Altitun GCSR laser, the NTT SSG-DBR laser and the Marconi SGDBR laser. Different types of measurements, from parasitic-free RIN measurements to eye-diagram measurements and link experiments, have been carried out. None of the investigated laser designs however was particularly optimised for high-speed operation. From the RIN measurements, the K-factor and the theoretical maximum modulation frequency under small-signal modulation have been derived. For all investigated lasers and for typically 40 to 50 channels with a spacing of 100 GHz, the theoretical maximum modulation frequency was always found to be close to and generally over 10 GHz.

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宽可调谐DBR激光二极管的直接调制带宽

宽可调谐激光二极管被认为是目前有前途的光源，在波分复用通信系统中，它们可以经济地用作备用发射机。然而，它们的功能在目前正在研究的一些新系统概念中也可能有用。对于这些新的系统概念，了解宽可调谐激光二极管可以直接调制到什么比特率是相关的。我们研究了3种宽可调谐激光二极管的直接调制特性:Altitun GCSR激光器、NTT SSG-DBR激光器和Marconi SGDBR激光器。不同类型的测量，从无寄生的RIN测量到眼图测量和链接实验，已经进行了。然而，所研究的激光设计都没有针对高速运行进行特别优化。从RIN测量中，推导出了小信号调制下的k因子和理论最大调制频率。对于所有被研究的激光器和典型的40到50个通道，间隔为100 GHz，理论最大调制频率总是被发现接近并且通常超过10 GHz。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Conference Digest. 2000 IEEE 17th International Semiconductor Laser Conference. (Cat. No.00CH37092)

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