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Temporal and spectral characteristics of single-longitudinal-mode short-coupled-cavity (SCC) InGaAsP lasers under multigigahertz direct modulation

Temporal and spectral characteristics of single-longitudinal-mode short-coupled-cavity (SCC) InGaAsP lasers under multigigahertz direct modulation

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© The Institution of Electrical Engineers
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Temporal and spectral characteristics of single-longitudinal-mode short-coupled cavity (SCC) InGaAsP injection lasers in the 1.5 μm wavelength range under high-frequency (1–7.5 GHz) direct modulation are reported. The effects of modulation on the spectral broadening and chirping of the longitudinal modes were studied. Predominantly single-longitudinal-mode operation under direct high-frequency modulation was achieved by compromising the on/off ratio.

Inspec keywords: optical modulation; laser modes; semiconductor junction lasers; gallium arsenide; indium compounds; gallium compounds; III-V semiconductors

Other keywords: single longitudinal mode short coupled cavity InGaAsP lasers; spectral characteristics; 1.5 micron wavelength; longitudinal modes; on/off ratio; spectral broadening; multigigahertz direct modulation; chirping; semiconductor laser; temporal characteristics

Subjects: Semiconductor lasers; Laser beam modulation, pulsing and switching; mode locking and tuning; Lasing action in semiconductors; Laser beam interactions and properties

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