MZM_FSR

[MHD NA]

Hi optiwave members;
Is extinction ration the same of Free space range (FSR) in MZM?

Regards;

[Ashu verma]

Hi Namera basically
Extintion ratio
In all telecom. systems (for any propagating wave) the extinction ratio is the ratio between “1” and “0” levels (peak and valley). There is the extinction ratio for two polarization components which is defined in the same manner.
In general, this ratio depends on modulation voltage (half-wave voltage) which in its turn depends on the materials you use and your regime parameters.

FSR
Free spectral range (FSR) is the spacing in optical frequency or wavelength between two successive reflected or transmitted optical intensity maxima or minima of an interferometer or diffractive optical element

[alistu]

Hi Mohammad,

They are absolutely different from one another. Logical zero is not always an absolute zero, it has some amount. So the ratio of the power of logical one to logical zero is a great amount, but no infinite. It’s a factor in optical sources with two logical levels of power. Free spectral range, whose wikipedia definition is mentioned above and I won’t go through it again, is a parameter in interferometers. These two are quite distinct. If you know a case which might confuse these two, please state.

Regards

[Ashu verma]

Thank you Alistu for making clear statement and mohammed hope our information helps you to understand the difference between two.Best of luck
Regards

[MHD NA]

Thank you alistu and Sam, i really had som confusion about FSR and extiction ratio, but now it is clear.

Regards,

[Author]

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