| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2013: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2012: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2011: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2010: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2009: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Research Abstract |
We demonstrated noise suppression characteristics of negative feedback optical amplifier using an optical triode. Optical triode was constituted by two semiconductor optical amplifiers. Noise suppression characteristic was evaluated by investigating the relationship of negative feedback light intensity with bit error rate. The BER curves obtained from measurement results showed reduction in BER as negative feedback light intensity increases. Further analysis revealed that although the signal gain decreases by 2.4 dB, power penalty was improved remarkably by 15 dB. This will result an output signal whose gain, waveform, and baseline, which stabilized automatically. Because of these experimental findings, it was shown possible to reduce optical amplification noise to a low level using optical triode. We also demonstrated an all-optical wavelength conversion and multicasting characteristics based on an all- optical triode using two negative feedback semiconductor optical amplifiers.
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