Quantum dot-in-a-well laser applications in analog optical links

Author

Lembrikov, B.I. ; Ben-Ezra, Y.

Author_Institution

Dept. of Electr. Eng., Holon Inst. of Technol., Holon, Israel

fYear

2011

fDate

26-30 June 2011

Firstpage

1

Lastpage

4

Abstract

Radio-over-fiber (RoF) techniques are widely used in modern communication systems. A typical RoF system referred to as an analog optical link (AOL) consists of a laser diode employing direct or external modulation, an optical fiber, and broadband photo detectors (PDs). Recently, quantum dot (QD) lasers based on self-organized InAs/InGaAS QDs placed in quantum wells (QWs) have been developed characterized by extremely low threshold current densities, high temperature stability, high linearity, large bandwidth, and low noise. We proposed QD lasers with DWELL structure (QDWELL lasers) as promising candidates for the improvement of the AOL performance. We have studied theoretically the performance of the QDWELL laser based AOL in the case of the multiband (MB) OFDM UWB signal transmission. We evaluated the spectrum of the baseband signal and the constellation diagram. The performance of AOL based on the QDWELL laser is significantly improved up to 10 GHz for small UWB signals.

Keywords

III-V semiconductors; OFDM modulation; current density; gallium arsenide; indium compounds; laser noise; optical communication equipment; optical links; optical modulation; photodetectors; quantum dot lasers; quantum well lasers; radio-over-fibre; ultra wideband communication; InAs-InGaAs; QDWELL lasers; analog optical links; baseband signal; broadband photodetectors; constellation diagram; direct modulation; external modulation; laser diode; laser noise; multiband OFDM UWB signal transmission; optical fiber; quantum dot-in-a-well laser; radio-over-fiber; self-organized quantum dot; temperature stability; threshold current densities; Charge carrier processes; Diode lasers; Laser theory; Modulation; Quantum dot lasers; Vertical cavity surface emitting lasers; Ultra wideband communications; quantum dot; quantum dot laser; quantum well;

fLanguage

English

Publisher

ieee

Conference_Titel

Transparent Optical Networks (ICTON), 2011 13th International Conference on

Conference_Location

Stockholm

ISSN

2161-2056

Print_ISBN

978-1-4577-0881-7

Electronic_ISBN

2161-2056

Type

conf

DOI

10.1109/ICTON.2011.5970902

Filename

5970902