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40-Gbps transmission over 5-km single-mode fiber using a directly modulated 1.3-μm AlGaInAs MQW distributed-reflector laser was demonstrated. Error-free operations up to 70°C have been achieved.
1.55-mum AlGaInAs semi-insulating buried-heterostructure distributed reflector lasers with 75-mum-long active region achieved very high slope values of relaxation oscillation frequency of 4.5 (25degC) and 3.5 GHz/mA1/2 (85degC), which realized 40-Gbps direct modulation up to 85degC.
This paper describes 1.3-mum AlGaInAs multiple-quantum-well semi-insulating buried-heterostructure distributed-feedback lasers for high-speed direct modulation. Combination of large differential gain AlGaInAs quantum wells and semi-insulating buried-heterostructure for reduction of active region achieved 25 and 40 Gb/s direct modulation with the device having the cavity length of 150 mum. The device...
1.3-mum semi-insulating buried-heterostructure AlGaInAs-MQW distributed reflector lasers have shown very high slope value of relaxation oscillation frequency of 4.0 GHz/mAfrac12. 25- and 40-Gb/s direct modulation has been achieved with low driving current.
High relaxation oscillation frequency of 20.5 GHz and its slope of 3.2 GHz/mA1/2 were obtained by SI-BH 1.3-mum AlGaInAs MQW DFB lasers. Eye-opening up to 50degC was demonstrated as a result of 40-Gb/s direct modulation.
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