How does erbium-doped fiber amplifiers work?

How does erbium-doped fiber amplifiers work?

In general, EDFA works on the principle of stimulating the emission of photons. With EDFA, an erbium-doped optical fiber at the core is pumped with light from laser diodes. EDFA amplification occurs as the pump laser excites the erbium ions, which then reach a higher energy level.

Why is erbium used in EDFA?

As we talked above, EDFA uses the erbium-doped fiber as an optical amplification medium. The 1550nm signal is amplified through interaction with the doping Erbium ions. This action amplifies a weak optical signal to a higher power, effecting a boost in the signal strength.

Which is the operating window of an erbium-doped fiber amplifier?

For erbium ions, the frequency v0 falls in the 1550-nm band and thus is an ideal amplifier for signals in the 1550-nm window, which is the lowest-loss window of silica-based optical fibers.

What are the applications of optical amplifiers?

Typical applications of optical amplifiers are:

  • An amplifier can boost the (average) power of a laser output to higher levels (→ master oscillator power amplifier = MOPA).
  • It can generate extremely high peak powers, particularly in ultrashort pulses, if the stored energy is extracted within a short time.

What is an erbium doped fiber amplifier?

Erbium-Doped Fiber Amplifier (EDFA) is an optical amplifier used in the C-band and L-band, where loss of telecom optical fibers becomes lowest in the entire optical telecommunication wavelength bands. The use of EDFA has eliminated the need for such O-E and E-O conversion, significantly simplifying the system.

Which amplifier is constructed using erbium doped glass?

Explanation: The erbium-based micro fiber amplifier uses Er3+-doped erbium glass. It supports the doping constructions of erbium ions at high levels as compared to conventional glasses. Explanation: As compared to all the amplifications, Raman amplification is more advantageous.

Which is constructed using erbium doped glass?

Why do we need optical amplifiers?

The optical amplifier is a device amplifying an optical signal directly, without the need to first convert it to an electrical signal. It’s important to safeguard a high-gain amplifier from the parasitic reflections, for the parasitic laser oscillation or perhaps to fiber will be damaged by these.

How do fiber amplifiers work?

Doped fiber amplifiers (DFAs) are optical amplifiers that use a doped optical fiber as a gain medium to amplify an optical signal. The pump laser excites ions into a higher energy from where they can decay via stimulated emission of a photon at the signal wavelength back to a lower energy level.

Is constructed using erbium doped glass?

Which is erbium doped fiber amplifier does Thorlabs use?

A complete set of performance graphs is available on the Graphs tab. Thorlabs’ core-pumped erbium-doped fiber amplifiers (EDFAs) offer >20 dBm (>100 mW) output power with a low noise figure of <5 dB. They are enclosed in a compact, turnkey benchtop package with FC/APC input and output connectors.

How much power does a Thorlabs EDFA produce?

This plot gives the wavelength-dependent output power as a function of input power for our polarization-maintaining EDFA. A complete set of performance graphs is available on the Graphs tab. Thorlabs’ core-pumped erbium-doped fiber amplifiers (EDFAs) offer >20 dBm (>100 mW) output power with a low noise figure of <5 dB.

How big is the erbium doped fiber astrogain?

Product Variant Specifications Model AG980H Cut-Off Wavelength (nm) 900 – 970 Numerical Aperture 0.22 – 0.24 Mode Field Diameter (μm) 5.5 – 6.3 @1550nm Attenuation (dB/km) ≤10 @1200nm

How are femtosecond laser pulses measured in erbium?

Femtosecond laser pulses centered at 1550 nm were emitted by an erbium fiber oscillator. The 3 dB spectral bandwidth of these pulses was measured to be 9 nm, corresponding to a transform-limited pulse width of 290 fs FWHM; the actual pulse width was measured by an intensity autocorrelator as 430 fs FWHM.