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Pure effects of strain in strained-layer multiple-quantum-well lasers

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4 Author(s)
Yasaka, H. ; NTT Opto-Electron. Lab., Kanagawa, Japan ; Iga, R. ; Noguchi, Y. ; Yoshikuni, Yuzo

The pure effects of strain in strained-layer InGaAs-InGaAsP multiple-quantum-well (MQW) Fabry-Perot (FP) lasers operating in the 1.5 μm region are measured separately from the quantum effects by using lasers whose active layer wells have the same thickness but different amounts of strain. The gain peak wavelengths of transverse electric (TE) and transverse magnetic (TM) modes and the difference between TE- and TM-mode gain peak wavelengths increase when compressive strain is introduced. The differential gain coefficient and the gain saturation coefficient of the lasers are determined by measuring relative intensity noise (RIN) spectra and are found to increase with increasing compressive strain. The K factors of the lasers are determined from the relationship between the damping constant and the resonant frequency square

Published in:

Quantum Electronics, IEEE Journal of  (Volume:29 ,  Issue: 4 )