Abstract
Detailed experimental characterization is performed for semi-insulating regrown buried heterostructure Fabry–Perot (FP) lasers having 20 strain-balanced quantum wells (QWs) in the active region. Light-current-voltage performance, electrical impedance, small-signal response below and above threshold, amplified spontaneous emission spectrum below threshold and relative intensity noise spectrum are measured. Different laser parameters such as external differential quantum efficiency , background optical loss , K-factor, D-factor, characteristic temperature , differential gain , gain-compression factor ϵ, carrier density versus current, differential carrier lifetime , optical gain spectrum below threshold, and chirp parameter α are extracted from these measurements. The FP lasers exhibited a high and very high-resonance frequency . The results indicate that appropriately designed lasers having a large number of InGaAsP well/InGaAlAs barrier QWs with shallow valence-band discontinuity can be useful for uncooled high-speed direct-modulated laser applications.
© 2009 Optical Society of America
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