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Polarization insensitive traveling wave type amplifier using strained multiple quantum well structure

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6 Author(s)
Magari, K. ; NTT Electron. Lab., Kanagawa, Japan ; Okamoto, M. ; Yasaka, H. ; Sato, K.
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Signal gain agreement between TE and TM modes is realized under a specific operation condition in a traveling wave type amplifier using a strained multiple quantum well structure for the first time. The signal gain of the TM mode completely agrees with that of the TE mode at an amplifier driving current of 70 mA. The identical signal gain is 7.5 dB at present. However, the signal gain could be easily improved by using a device with a longer active region. In order to achieve polarization insensitive TWAs, the design parameter is the only confinement factor for the conventional bulk type.<>

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Photonics Technology Letters, IEEE  (Volume:2 ,  Issue: 8 )