Title :
Wavelength conversion for frequency-modulated light using optical modulation to oscillation frequency of a DFB laser diode
Author_Institution :
NTT Lab., Kanagawa, Japan
fDate :
6/1/1990 12:00:00 AM
Abstract :
A technique for wavelength conversion for frequency-modulated (FM) light is described. It utilizes the light-injection-induced frequency shift of a distributed-feedback (DFB) laser diode and the frequency-modulated-to-intensity-modulated (FM-IM) conversion function of the Mach-Zehnder (M-Z) optical filter. Input FM light is converted into IM light by the M-Z filter. The IM light is injected into the DFB-LD oscillating at another wavelength, modulating its oscillation frequency. The output from the DFB-LD has an FM signal identical to the input FM light. Thus, wavelength conversion for FM light is achieved. The characteristics of the frequency shift induced by this optical injection were experimentally studied using a λ/4 phase-shift DFB-LD. A wavelength conversion experiment was performed. In the experimental demonstration, FM light at 1.534 μm was converted into FM light at 1.550 μm
Keywords :
distributed feedback lasers; frequency modulation; optical filters; optical modulation; semiconductor junction lasers; 1.534 micron; 1.550 micron; DFB laser diode; FM light; FM signal; Mach-Zehnder optical filter; frequency-modulated light; frequency-modulated-to-intensity-modulated; light-injection-induced frequency shift; optical injection; optical modulation; oscillation frequency; wavelength conversion; Frequency conversion; Frequency modulation; Frequency shift keying; Optical filters; Optical frequency conversion; Optical mixing; Optical modulation; Optical pumping; Optical receivers; Optical wavelength conversion;
Journal_Title :
Lightwave Technology, Journal of
