In intensity modulation, the ratio of the optical power P1 for a "1" to the power P0 for a "0", expressed in dB as 10 log(P1/P0). The larger it is, the greater the difference between 1 and 0 and the fewer decision errors at the receiver.
Japanese name: 消光比
Extinction ratio appears in 1 practice question across 1 topic, including Silicon photonics.
Field: Silicon photonics
Answer: A. The ratio of the optical power when sending a "1" to the optical power when sending a "0"
Intensity modulation makes "1" bright and "0" dark, but in a real modulator the light does not go completely off even for "0". The extinction ratio is the ratio of the "1" power P1 to the "0" power P0, expressed in dB as 10 log(P1/P0). For example, with an extinction ratio of 6 dB, P0 is about one-quarter of P1. A small extinction ratio narrows the difference between "1" and "0", making decision errors at the receiver more likely. In a Mach-Zehnder modulator, increasing the drive voltage swing raises the extinction ratio but increases the driver circuit's power consumption. The ratio of transmitted to received power represents the link loss.
The extinction ratio is the ratio of the "1" power P1 to the "0" power P0, expressed in dB as 10 log(P1/P0).
Which correctly describes the extinction ratio, a measure o…As an Amazon Associate I earn from qualifying purchases.
Mach-Zehnder modulator C-band Chromatic dispersion CPO (co-packaged optics) Edge coupler Grating coupler O-band Plasma dispersion effect Propagation loss Refractive index