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Low Driving Voltage Operation of MZI-Type EA Modulator Integrated With DFB Laser Using Optical Absorption and Interferometric Extinction
- Source :
- IEEE Journal of Selected Topics in Quantum Electronics. 21:195-200
- Publication Year :
- 2015
- Publisher :
- Institute of Electrical and Electronics Engineers (IEEE), 2015.
-
Abstract
- We have developed a novel electroabsorption modulator (EAM)-integrated distributed feedback laser (EA-DFB laser), in which an EAM functioning as an external modulator is integrated in a Mach–Zehnder interferometer (MZI). The MZI-type EAM (MZEA) modulates light intensity by both optical absorption and interferometric extinction. As a result, it improves the extinction ratio (ER) of a conventional EAM, which allows us to reduce the modulation voltage ( $V_{{\rm m}}$ ), and thus reduce the power consumption of the driver circuit. A fabricated MZEA-integrated DFB laser (MZEA-DFB laser) exhibited high-ER operation and an output power of about 8 dBm, which is comparable to that of a conventional EA-DFB laser, with a 100-mA laser current. Thanks to the high ER and sufficient output power, the MZEA-DFB laser operating at half the $V_{{\rm m}}$ of a conventional EA-DFB laser is able to generate optical signals with a given optical modulation amplitude, and we achieved a 25.8-Gb/s 40-km transmission with the novel laser at a $V_{{\rm m}}$ of $1 {\rm V_{pp}}$ .
- Subjects :
- Physics
Distributed feedback laser
Extinction ratio
business.industry
Type (model theory)
Optical modulation amplitude
Laser
Atomic and Molecular Physics, and Optics
Semiconductor laser theory
law.invention
Light intensity
Optics
law
Optoelectronics
Laser power scaling
Electrical and Electronic Engineering
business
Subjects
Details
- ISSN :
- 15584542 and 1077260X
- Volume :
- 21
- Database :
- OpenAIRE
- Journal :
- IEEE Journal of Selected Topics in Quantum Electronics
- Accession number :
- edsair.doi...........9370f8c09d2749203ea1255abecdafe0