Theoretical investigation of the second-order harmonic distortion in the AM response of 1. 55. mu. m F-P and DFB lasers

Journal Article · Thu Aug 01 00:00:00 EDT 1991 · IEEE Journal of Quantum Electronics (Institute of Electrical and Electronics Engineers); (United States)

DOI:https://doi.org/10.1109/3.83409· OSTI ID:5761468

Morthier, G; Libbrecht, F; David, K; Vankwikelberge, P; Baets, R G ^[1]

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1. Lab. of Electromagnetism and Acoustics, Univ. of Gent-IMEC, B-9000 Gent (BE)

In this paper numerical calculations of the second-order harmonic distortion in the amplitude modulation-response of Fabry-Perot and distributed feedback lasers are presented and the influence of several nonlinearities, such as longitudinal spatial hole burning, gain suppression, and relaxation oscillations is considered in detail. The author's analysis is valid for modulation frequencies ranging from a few megahertz to well beyond the resonance frequency of the relaxation oscillation. The numerical calculation of the distortion is based on the laser model CLADDISS and consists of an extended small signal solution (up to second-order) of the set of coupled wave equations and the local carrier density rate equations. The distortion is investigated for Fabry-Perot lasers for which the effects of spontaneous emission and gain suppression can be clearly illustrated and for DFB lasers where the emphasis is on the influence of spatial hole burning and its combination with other nonlinearities. Various effects are discussed, e.g., the occurrence of a dip in the frequency dependence of the distortion resulting from the combination of spatial hole burning and relaxation oscillation contributions in some cases and the occurrence of a dip in the bias dependence when spatial hole burning and gain suppression contributions cancel each other.

• OSTI ID: 5761468
• Journal Information: IEEE Journal of Quantum Electronics (Institute of Electrical and Electronics Engineers); (United States), Vol. 27:8; ISSN 0018-9197
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
LASERS
HARMONICS
AMPLITUDES
DISTRIBUTION
FABRY-PEROT INTERFEROMETER
FEEDBACK
FREQUENCY DEPENDENCE
GAIN
INHIBITION
MODULATION
NEAR INFRARED RADIATION
NONLINEAR PROBLEMS
NUMERICAL SOLUTION
OPTICAL PROPERTIES
AMPLIFICATION
ELECTROMAGNETIC RADIATION
INFRARED RADIATION
INTERFEROMETERS
MEASURING INSTRUMENTS
OSCILLATIONS
PHYSICAL PROPERTIES
RADIATIONS
426002* - Engineering- Lasers & Masers- (1990-)