Principle and characteristics of different optical switches

Since the first generation telecommunication network, the telephone switching system has adopted a large number of switches to form switching units to complete the circuit switching between users. Today, the all-optical network based on DWDM has become hotspot and developing direction of telecommunication network a new generation of optical signals of different wavelengths in the network to realize routing must use optical switch, optical switch is the core device to complete exchange, plays an irreplaceable role in optical network are widely used at present in. There are many types of optical switches, the following we Nanning light switch manufacturers to introduce you to several new light switches, to see what difference between them, so that we have the appropriate choice.

1 holographic grating switch. The principle of holographic grating switch is to realize selective reflection of light by Prague grating. The Prague grating is generated inside the crystal by holographic mode. When the power is switched on, the Prague grating will reflect the light to the output port. Without electricity, the light will pass through the crystal directly. The advantage of this product is that the switching speed can be very fast, and can be composed of many ports of the optical switching system, but the power consumption of the equipment will be relatively large.

2 、 micro electro mechanical light switch. Micro electro mechanical systems (MEMS) have been applied in many fields. In the optical communications industry, MEMS based optical switch solutions are developing slowly. The basic principle is that mechanical rotation of the movable micro mirror can be carried out by electrostatic or other control force, and the direction of the input light is changed so as to realize the switching function. The MEMS technology used in micro electro mechanical optical switch makes it have nothing to do with the parameters of optical signal, wavelength, format and protocol, so it is superior to other types of optical switches in terms of loss and expansibility. However, due to the complexity of the drive process, there are some defects in its reliability, and the cost is relatively high.

3 、 liquid crystal light switch. Most liquid crystal light switches perform switching functions by applying an external power plant to control the direction of the liquid crystal molecules. The principle of liquid crystal optical switch is: firstly the input light is divided into two polarized light, then the light input to the liquid crystal inside the liquid crystal in accordance with the change of voltage to change the polarization state of the polarized light in the last two, into passive devices. When the voltage is applied, the light is blocked by a liquid crystal; when no voltage is applied, the light can pass through, thus realizing the two states of the switching of the optical switch.

The above is about the principle and characteristics of different types of optical switches, we select the light switch, you can use the corresponding choice. Our company dedicated to provide our customers with high-quality new light switches in Nanning, but also in accordance with the special requirements of customers to provide personalized design and production. Welcome everyone to come to question, order, we will provide you with quality service.