- #1

yoni3468

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Hi all,

I have a question regarding a fiber optics based communications system:

The light source is a Fabry-Perot LASER, which outputs 5 longitudinal modes.

The communication rates are: [tex]\Delta\omega[/tex]=100Grads[tex]^{-1}[/tex], B=10Gbs[tex]^{-1}[/tex], and the dispersion coefficient is [tex]\beta_{2}[/tex]=10[tex]\frac{ps^{2}}{Km}[/tex].

What is the maximum distance of transmission we can use this system for (without using any amplifiers)?

The answers are phrased in a nutshell, and the answer is:

BLI|[tex]\beta_{2}[/tex]|(4[tex]\Delta\omega[/tex]) [tex]\leq[/tex] 1 [tex]\Rightarrow[/tex] L=25Km.

I have never seen this equation (What is I?). Can anybody try to explain?

Thanks in advance.

I have a question regarding a fiber optics based communications system:

The light source is a Fabry-Perot LASER, which outputs 5 longitudinal modes.

The communication rates are: [tex]\Delta\omega[/tex]=100Grads[tex]^{-1}[/tex], B=10Gbs[tex]^{-1}[/tex], and the dispersion coefficient is [tex]\beta_{2}[/tex]=10[tex]\frac{ps^{2}}{Km}[/tex].

What is the maximum distance of transmission we can use this system for (without using any amplifiers)?

The answers are phrased in a nutshell, and the answer is:

BLI|[tex]\beta_{2}[/tex]|(4[tex]\Delta\omega[/tex]) [tex]\leq[/tex] 1 [tex]\Rightarrow[/tex] L=25Km.

I have never seen this equation (What is I?). Can anybody try to explain?

Thanks in advance.

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