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Deposition Sciences Inc. - Difficult Coatings - LB - 8/23

Double-Pass Amplifier Delivers High Gain and Low Noise

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Breck Hitz

Researchers at Universiti Putra Malaysia in Serdang have conceived and implemented a double-pass amplifier that incorporates a narrow-bandpass filter between the first and second passes to filter out amplified spontaneous emission. The amplifier has high gain, low noise and good sensitivity to low input signals, important characteristics of these critical components of optical communications systems. Figure 1. Radiation at 1550 nm passes through the erbium-doped fiber amplifier, a narrowband filter and back through the fiber amplifier. In the setup, a 980-nm laser diode capable of output...Read full article

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    Published: November 2003
    Communicationsdouble-pass amplifiernarrow-bandpass filteroptical communications systemsResearch & Technology

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