Browsing by Author "LIN, HT"

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A STUDY OF HARMONIC DISTORTIONS AND PERIOD DOUBLING IN DFB RIDGE WAVE-GUIDE LASER WITH STRONG CURRENT MODULATION
(1992-04-01)
KAO, YH
;
LIN, HT
;
傳播研究所
;
電信研究中心
;
Institute of Communication Studies
We report measurements of the harmonic distortions and period doubling (PD) in a 1.55-mu-m InGaAsP DFB laser under sinusoidal current modulation. It is found that most degradation of the modulated signal occurring with frequency near the submultiples of relaxation frequency is only for small-signal operation and is violated under large-signal operation. The dynamics can be satisfactorily predicted by employing the Tucker's large-signal model [Tucker and Kaminow, J. Lightwave Technol. LT-2 (1984) 385.].
INFLUENCES OF NOISE ON THE OCCURRENCE OF PERIOD-DOUBLING IN DISTRIBUTED-FEEDBACK LASER-DIODES UNDER DIRECT-CURRENT MODULATION
(1993-10-20)
KAO, YH
;
LIN, HT
;
傳播研究所
;
電信研究中心
;
Institute of Communication Studies
The influences of Langevin noise on period doubling (PD) of a strongly modulated distributed-feedback laser have been investigated. The onset of PD was confirmed to be reduced through the use of the rate equations as a model. The threshold values of PD were examined in terms of driving frequency and rf power and have been compared with the measurements of PD.
NOISE ENHANCEMENT OF PERIOD DOUBLING IN STRONGLY MODULATED SEMICONDUCTOR-LASERS
(1992-07-01)
KAO, YH
;
LIN, HT
;
WANG, CS
;
電信工程研究所
;
光電工程學系
In this paper the phenomena of period doubling and bistability of multiple spiking states in deeply modulated laser diodes are investigated. The situations of in which the period doubling in the parameter space occurs are indicated. The influence of noise on the period doubling is examined by employing the singl-mode rate equations with Langevin noise.
PERSISTENT PROPERTIES OF PERIOD-DOUBLING IN DIRECTLY MODULATED SEMICONDUCTOR-LASERS
(1993-09-01)
KAO, YH
;
LIN, HT
;
電信工程研究所
;
Institute of Communications Engineering
In this paper the inherent properties of period-doubling behavior in deeply modulated laser diodes were investigated. The thresholds for the period doubling in terms of the controlling parameters were indicated. With the consideration of Langevin noise in the single-mode rate equations, it was indicated that the noise acted as a virtual Hopf precursor for the event of period doubling. The linewidth and frequency shifting of the noise bump were predicted by Floquet multipliers. Finally, a comparison of the noise bumps obtained from the simulated and analytic methods was also presented.
VIRTUAL HOPF PRECURSOR OF PERIOD-DOUBLING ROUTE IN DIRECTLY MODULATED SEMICONDUCTOR-LASERS
(1993-06-01)
KAO, YH
;
LIN, HT
;
電信工程研究所
;
電信研究中心
;
Institute of Communications Engineering
In this paper the noise effects on the period-doubling route in deeply modulated laser diodes were investigated. The dynamics were studied by employing the single-mode rate equations with consideration of Langevin noise. It was identified that the period-doubling event in laser diodes had a virtual Hopf precursor and was enhanced by the existed Langevin noise.