A magneto-optic spatial light modulator consists of one- or two-dimensional spatial array of independently addressable Faraday rotators placed between a polarizer and an analyzer. Light modulation is the process by which its properties, such as amplitude, phase, pulse width, and direction, are changed during passage through a medium. Two different schemes are employed for light modulation: internal modulation and external modulation. Internal modulation uses a simple circuit. The Faraday effect or Faraday rotation, sometimes referred to as the magneto-optic Faraday effect (MOFE), is a physical magneto-optical phenomenon. Polarization is rotated non-reciprocally, meaning that light. In Faraday Effect, the phase modulation of two mutually perpendicular components of linearly polarized light results into polarization modulation, which is then transformed into Amplitude Modulation by analyzer.
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