Microwave/millimeter-wave frequency subcarrier lightwave modulations based on self-sustained pulsation of laser diode

Author

Wang, Xiaolu ; Li, Guifang ; Ih, Charles S.

Author_Institution

Brimrose Corp. of America, Baltimore, MD, USA

Volume

11

Issue

2

fYear

1993

fDate

2/1/1993 12:00:00 AM

Firstpage

309

Lastpage

315

Abstract

A method of subcarrier lightwave modulation based on the self-sustained pulsation (SSP) of laser diodes is presented. The tunable microwave/millimeter-wave frequency subcarrier is generated by the laser diode itself under proper DC biases. The subcarrier is frequency-modulated when the DC bias is superimposed with a small AC signal. No external modulation is needed. A theoretical analysis based on a double-section laser diode reveals that Hopf bifurcation is the origin of SSP. Theoretical calculations also show that the modulator has the potential of generating subcarriers up to 100 GHz by proper control of the device parameters V-channeled substrate inner-stripe (VSIS) GaAlAs laser diodes were used to generate 1-7-GHz SSP subcarriers. A preliminary subcarrier multiplexing (SCM) experiment demonstrated the transmission of 1-GHz modulation and video signals on a readily FM-modulated 6.3-GHz SSP subcarrier

Keywords

III-V semiconductors; aluminium compounds; bifurcation; frequency modulation; gallium arsenide; laser tuning; optical communication equipment; optical modulation; semiconductor lasers; subcarrier multiplexing; video signals; 1 to 7 GHz; 100 GHz; 6.3 GHz; FM-modulated; GaAlAs; Hopf bifurcation; V-channeled; double-section laser diode; frequency-modulated; laser diode; microwave modulation; millimeter-wave frequency subcarrier lightwave modulations; proper DC biases; self-sustained pulsation; semiconductors; small AC signal; subcarrier multiplexing; substrate inner-stripe; tunable; video signals; Bandwidth; Diode lasers; Electrooptic modulators; Frequency modulation; High speed optical techniques; Millimeter wave technology; Optical feedback; Optical modulation; Optical surface waves; Optical waveguides;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.212543

Filename

212543