Optical switching is a device with one or more optional transmission windows, which can convert or operate optical signals in optical transmission lines or integrated optical paths. The basic form of optical switch is 2 × 2, i.e. there are two optical fibers at the input end and the output end, which can complete two connection states: parallel connection and cross connection.
Optical line protection system is combined of OLP-Optical Line Protection and operation maintainance terminal,it can realize optical power monitoring、optical line auto-switching and network management etc. In optical communication network, OLP monitors optical power of optical fiber and standby optical fiber at real time.In case the current optical power of optical fiber is less than pre-set switching threshold value, then alarm is on and it would switch to standby optical fiber automatically to protect optical transmission system line.OLP can provide a protection scheme for all routes and main lines easily with low cost, can protect all networks which needs optical line switching, all these above can make a optical communication network with no-block、high reliability、safety and high anti-disaster strength.
Features
● Transparent transmission
● Automatic switching with no interruption
● With LCD screen and control panel
● With network management
● To increase network reliability and improve service quality
● Real-time monitoring power level of fiber
● Flexible schedule patch
Optical Specifications
Parameter | Unit | 1:1 |
Working wavelength | nm | 1310±50nm and 1550±50nm |
Monitoring Power range | dBm | ＋23～-50 |
Monitoring power accuracy | dB | ±0.25 |
Monitoring power resolution | dB | ±0.01 |
Return loss | dB | ≥55 |
PDL | dB | ≤0.05 |
WDL | dB | ≤0.1 |
Insertion loss | dB | TX<1.2、RX<1.2 |
Switching time | ms | <35 |
Durability(Life) | times | >107 |
Operating temperature | ℃ | -10～+60°C |
Storage temperature | ℃ | -20～+75°C |
Power supply | V | DC(36-72)V and AC(85-264)V/50~60Hz，dual power supply |
Power-down Condition | hold in working path or switch to backup path | |
Optical connectors | SC/PC | |
Dimension | Standard 19' 1U/4U |
Classification
The traditional mechanical optical switch changes the optical path by the movement of optical fiber or optical elements (lens or mirror), and sends or reflects light directly to the output end. Mechanical optical switch is not suitable for large-scale switch matrix and application due to its large volume and long switching time, but it has low insertion loss, small crosstalk, good repeatability, independent of the optical wavelength and polarization state, and is cheap. Low port 1 × 2, 2 × 2 mechanical optical switch is the best choice for users. Even for n × n (n > 2) arrays, optical switches can be assembled by 1 × 2 or 2 × 2 switches. In the primary experimental stage of all-optical network, mechanical optical switch still plays an irreplaceable role.
Micro electro mechanical system optical switch -- the speed is relatively slow, generally in the order of milliseconds, large volume, not easy to scale integration of shortcomings, limiting its application in the field of optical communication in the future. On this basis, MEMS optical switch is developing rapidly in recent years. It is a new type of micro electro optical integrated switch, which is produced by the combination of semiconductor micromachining technology, micro optics and micromachining technology. It has the advantages of transparent data format, polarization independence, small difference, good reliability, fast speed and easy integration. It has become a large capacity switching optical network switch The mainstream direction of development.
Applications Sketch
Optical switch is a kind of optical circuit converter. In optical fiber transmission systems, optical switches are used for conversion of multiple monitors, LAN, multi light sources, detectors and protection Ethernet. In the optical fiber testing system, it is used for fiber, fiber equipment testing and network testing, and fiber sensing multi-point monitoring system.
Optical switch plays a very important role in optical network. In wavelength division multiplexing (WDM) transmission system, optical switch can be used for wavelength adaptation, regeneration and clock extraction; in optical time division multiplex (OTDM) system, optical switch can be used for demultiplexing; in all-optical switching system, optical switch is optical Cross connect (OXC) is the key device of wavelength conversion. According to the number of input and output ports of optical switch, it can be divided into 1 × 1, 1 × 2, 1 × n, 2 × 2, 2 × n, m × N and so on. They have different uses in different occasions.
Its application scope mainly includes: protection switching system of optical network, light source control in optical fiber test, real-time monitoring system of network performance, test of optical devices, construction of switching core of OXC equipment, optical plug / demultiplexer, optical test, optical sensor system, etc.
Applications
1. Protection switching system of optical network
2. Light source control in optical fiber test
The 1 × 2 optical switch is mainly used to switch on and off the light source in the optical fiber testing technology.
3. Real time monitoring system of network performance
4. Optical device test
The production and inspection of components can be realized by using 1 × n optical switch.
5. Build the exchange core of OXC equipment
OXC is mainly used in backbone network to gather and exchange services of different subnets. Because OXC is mainly used in high-speed and high-capacity dense wavelength division multiplexing optical backbone networks, optical switches are required to have the characteristics of transparency, high speed, large capacity and multi granularity switching. For example, n × n optical switch matrices such as 8x8, 16 × 16, 32 × 32, 64 × 64, 256 × 256 can be formed by using 2 × 2 optical switch units, which are the core components of OXC. OXC mainly realizes dynamic optical path management, optical network fault protection, and can flexibly add new services.
6. Optical add drop multiplexing
0adm is mainly used in ring-shaped metropolitan area network (man) to realize the free up / down voice path of single wavelength and multiple wavelengths from optical path. Optical switch matrix is the key part of 0adm. With OADM, the dynamic up / down wavelength can be controlled by software, which will increase the flexibility of network configuration.
7. Optical sensing system
The 1 × n optical switch can also be used in point sensing system to realize space division multiplexing and time division multiplexing.
8. Optical test
1 × N and N × 1 optical switches can also form optical scanning mirror arrays
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