A Single Polarization Phase Modulation Optical Device

Abstract

The invention discloses a single polarization phase modulation optical device, which comprises a polarization coupled phase modulation element (1) and a non-polarization phase modulation element (2) which are connected to each other as a whole, and are respectively marked as a polarization part and a non-polarization part. The phase of one of the orthogonally polarized bases can be gain modulated and the phase modulation of the other orthogonally polarized base can be cancelled. The present invention utilizes the phase combination of polarization coupling phase and polarization-independent phase, gains the phase modulation of one of the orthogonal polarization bases, offsets the phase modulation of the other orthogonal polarization base, and realizes the function of phase modulation on a single polarization component, because different components A fixed structure is adopted between them, so this function can be realized stably.

Description

technical field [0001] The invention belongs to the field of optical technology, in particular to a single polarization phase modulation optical device. Background technique [0002] The asymmetry of the vibration direction of light waves with respect to the propagation direction is called polarization, and the polarization of light is the embodiment of the wave nature of light. The polarization space of light acts as the inner space, which is composed of two orthogonal substrates. In traditional optical devices, non-polarizing devices will not modulate polarization, while polarizing devices, such as half-wave plates, quarter-wave plates, and polarizing lenses, will simultaneously modulate two orthogonal substrates. In particular, if the light is incident at Brewster's angle, the reflected light can be a single polarization without affecting the other polarization. Another example is the energy level of the atomic ensemble, which requires strict control of environmental fa...

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Problems solved by technology

However, due to its stability issues, the requirements for the experimental environment are extremely stringent

The Sagnac interferometer is an improved version of the Mach-Zehnder interferometer. It has a shared device in the optical path to improve stability, but it will make the optical path extremely complicated in some complex experiments and applications.

Other path interferometers, such as Michelson interferometers, birefringent crystal interferometers, etc., also have disadvantages in stability and complexity

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