What does an optical modulator do?
An optical modulator is a device which can be used for manipulating a property of light – often of an optical beam, e.g. a laser beam. Depending on which property of light is controlled, modulators are called intensity modulators, phase modulators, polarization modulators, spatial light modulators, etc.
What is silicon photonic modulator?
Silicon photonics (SiPh), a photonic integrated circuit technology that leverages the fabrication sophistication of complementary metal-oxide-semiconductor technology, is well-positioned to deliver the performance, price, and manufacturing volume for the high-speed modulators of future optical communication links.
Why optical beam can be modulated using silicon devices?
Optical modulators can be implemented using Semiconductor Nano-structures to increase the performance like high operation, high stability, high speed response, and highly compact system.
What is a modulation circuit?
A modulator is an electronic circuit that superimposes a low-frequency (information) signal onto a high-frequency (carrier) signal for the purpose of wireless transmission.
Why silicon material is not useful in Pockel’s effect Kerr effect and Franz Keldysh effect?
This is because electric field effects based on electro-refraction such as the Pockels effect do not exist in silicon while the Kerr effect induces a small refractive index change ∆ = 10 , for an applied electric field of 10 V/m (Soref et.
What is modulator device?
A modulator is a device or circuit that performs modulation. A demodulator (sometimes detector) is a circuit that performs demodulation, the inverse of modulation. A modem (from modulator–demodulator), used in bidirectional communication, can perform both operations.
How do optical modulators in Silicon induce absorption?
So far we have discussed how optical modulators in silicon can cause changes in the refractive index that induce absorption. The process of inducing absorption directly modulates the intensity of a propagating mode, so it is obvious to see how modulation is achieved in such devices.
What is an optical modulator and how does it work?
An optical modulator is a device that is used to modulate (that is, vary the fundamental characteristics of) a light beam propagating either in free space or in an optical waveguide. These device can alter different beam parameters, allowing them to be categorized as either amplitude, phase or polarization modulators.
What is the bandwidth of Si photonics optical modulators?
Recently, researchers from Intel Corp. 22 have demonstrated experimentally a Si-based optical modulator with a bandwidth that exceeds 1 GHz for the first time. This is a major milestone in Si photonics and has attracted huge media attention.
What is an infrared silicon optical modulator?
An infrared silicon optical modulator of metal-oxide-semiconductor capacitor based on accumulation-carrier absorption. Jpn. J.