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Extremely narrow spectral linewidth and low chirping of the MQW-DFB-PPIBH laser diode

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6 Author(s)
Kakimoto, S. ; Mitsubishi Electr. Corp., Hyogo, Japan ; Nakajima, Y. ; Sakakibara, Y. ; Watanabe, H.
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The low threshold current of 9 mA, the high side-mode suppression ratio of more than 45 dB, the extremely narrow spectral linewidth of 1.1 MHz, and the low chirping of 2.8 Å at -20 dB at 2 Gb/s nonreturn to zero (NRZ) modulation have been achieved in the multiple quantum well (MQW) distributed feedback (DFB) p-substrate partially inverted buried heterostructure (PPIBH) laser diode. The spectral linewidth of 1.1 MHz is the narrowest value among 300-μm-length solitary laser diodes. These results suggest that the MQW-DFB laser diodes are a promising light source for longer distance and higher bit-rate optical communication systems and coherent optical communication systems

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Quantum Electronics, IEEE Journal of  (Volume:26 ,  Issue: 9 )