Ch6Sec8 - OUTPUT SIGNAL 1550 nm ERBIUM-DOPED FIBER LOOP...

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THE FIBER FORUM Fiber Optic Communications JOSEPH C. PALAIS PRESENTED BY
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Joseph C. Palais 6.8 2 Section 6.8 Fiber Lasers Laser diodes and LEDs couple inefficiently into glass fibers. If we can build a laser in the form of a fiber, coupling would be much better. We know that fiber amplifiers are possible, thus a fiber oscillator (i.e., a laser) should be possible. Two fiber lasers are shown in the following slides.
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Joseph C. Palais 6.8 3 Fabry-Perot Fiber Laser 1.55 μ m Pump Laser Diode 0.98 μ m (or 1.48 μ m) Erbium-Doped Silica Fiber Transmission Fiber Mirrors The mirrors partially reflect at 1.55 μ m and transmit at the pump wavelength.
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Joseph C. Palais 6.7 4 Erbium Doped Fiber Laser WDM PUMP LASER
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Unformatted text preview: OUTPUT SIGNAL 1550 nm ERBIUM-DOPED FIBER LOOP GRATING GRATING 980 nm GRATING: Fiber Bragg grating WDM: Wavelength division multiplexer Joseph C. Palais 6.7 5 Erbium Doped Fiber Laser • The fiber Bragg gratings act as reflectors. They are described in Chapter 9. • The wavelength division multiplexer (WDM) couples the pump light into the erbium-doped fiber loop. WDMs are also described in Chapter 9. Joseph C. Palais 6.7 6 Erbium Doped Fiber Laser • The fiber is the amplifier. • The grating provides the feedback. • The pump laser diode provides the input power. • The fiber laser can be simply spliced to the transmission fiber....
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This note was uploaded on 05/11/2010 for the course EEE EEE-448 taught by Professor Palais during the Fall '09 term at ASU.

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Ch6Sec8 - OUTPUT SIGNAL 1550 nm ERBIUM-DOPED FIBER LOOP...

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