Rack Optical Switch, Rackmount Fiber Optical Switches|GlsunMall

GLSUN Rackmounted optical switch is a kind of optical path control and switching device to choose working optical path switch manually with button and also control optical path switch or scan in frequency the optical switch which need to be monitored with RS 232 port and Ethernet port.

GLSUN MEMS 1xN Optical Switch

GLSUN MEMS 1xN optical switch is based on micro-electro-mechanical system, which uses optical micro mirrors or optical micro-mirror arrays to change the propagation direction of light beam to achieve optical path switching. This 1xN MEMS Optical Switch is mainly used for DWDM networks, channel monitor and R&D in laboratory.

All-Optical Switches: MEMS vs Mechanical Switches in Fiber Optical Network

In the optical fiber communication system, the Optical Switch (OS) is mainly used to realize the physical switching of optical signals or other logical operations in the optical path, and is mostly used in the optical cross-connect (OXC) technology as a key device for switching the optical path.

Types of Optical Switches

According to the number of input and output ports of the optical switch, it can be divided into 1x1, 1x2, 1xN , 2x2, 2xN, MxN, etc. Thus optical switch has one or more transmission windows for different uses in different occasions.

Classified from the manufacturing process, optical switches can be divided into mechanical optical switches, thermo-optical switches, acousto-optical switches, electro-optical switches, magneto-optical switches, liquid crystal optical switches and MEMS optical switches, etc. Among them, mechanical optical switches and MEMS optical switches are two widely used optical switches.

Mechanical Optical Switches

The mechanical/optomechanical switch may be regarded as the oldest type of optical switches. The working principle of the mechanical optical switch is to redirect the optical signal by physically moving the optical fiber with the aid of a mechanical device. By moving the prism or the directional coupler, the light at the input end is directed to the required output port. There are three main types of mechanical optical switches: one is to use prism to switch the optical path technology, the other is to use mirror switching technology, and the third is to switch the optical path by moving optical fibers. Read more on All-Optical Switches: MEMS vs Mechanical Switches in Fiber Optical Network.

Passive Fiber Optical Components, Devices, Solutions|GlsunMall

GLsun provides full range of passive fiber optical components, devices such as optical plc splitters, circulators, isolators, attenuators and WDM devices & modules for higher capacity fiber network transport in business, data center, and telecommunication operation. 

What are WDM, CWDM, CCWDM, DWDM, FWDM, LWDM Multiplexer

 What is WDM

WDM (optical Division Multiplexing) is the technology to combine two or more optical carrier signals of different wavelengths (carrying various information) at the transmitting end through a Multiplexer coupled to the same optical fiber for transmission. At the receiving end the optical signals of various wavelengths are separated by Demultiplexer, and then restored to the original signal by the optical receiver for further processing. The main purpose of WDM is to increase the bandwidth capacity of optical fibers. Therefore, WDM systems are widely used by telecom operators to expand capacity through WDM without laying more optical fibers.

What is CWDM, CCWDM, DWDM, FWDM, LWDM

WDM solutions include CWDM (Coarse Wavelength Division Multiplexing), CCWDM (Compact Coarse Wavelength Division Multiplexing), DWDM (Dense Wavelength Division Multiplexing), FWDM (Filter Wavelength Division Multiplexing) and LWDM (LAN Wavelength Division Multiplexing).

CWDM (Coarse Wavelength Division Multiplexer)

CWDM consists of 18 different wavelength channels spaced 20 nm apart from 1270nm to 1610nm. CWDM supports fewer channels than DWDM because it is compact and cost-effective, making it an ideal solution for short range communication. The main advantage of CWDM system is its low cost, which is reflected in filters and lasers. The wide wavelength interval of 20nm demands low technical requirement for laser and simplified structure of optical multiplexer/demultiplexer for CWDM. With simplified structure and improved yield, the cost is reduced.

DWDM (Dense Wavelength Division Multiplexer)

The channel spacing of DWDM is 1.6/0.8/0.4 nm (200GHz/100 GHz/50 GHz), much narrower than that of CWDM. Compared with CWDM, DWDM has dense wavelength spacing and can support 8 to 160 wavelengths on one optic fiber, very sui for long-haul transmission. Combined with EDFA, DWDM system can work within a range of thousands of kilometers. Read more on WDM, CWDM, CCWDM, DWDM, FWDM, LWDM Multiplexer.

OLP 1+1 / OLP 1:1 Optical Line Protection, OLP Protection Equipment | GLSUN

GLSUN Fiber Optical Transmission Line Protection System (OLP) uses vacant optical fiber to switch from different route to build a backup path for protecting the backbone and important business line. OLP Optical Line Protection types include OLP 1+1 and OLP 1:1.

Features

- Modularized design, Compact size, Support hot Plug.

- Wide wavelength range, Low insertion loss, Low crosstalk, Fast switching speed.

- Transparent transmission, High Stability, High Reliability, Support path latching while there is no optical signal.

- Support the protecting ways: OLP 1: 1 mode, OLP 1+1 mode, two-fiber bidirectional, single fiber bidirectional.  

What Does an Optical Switch Do in Fiber Optic Network

Optical Switch (OS) is a device used to close an optical circuit and selectably convert, logically switch the optical signal transmission in optical paths. An optical switch has one or more inputs ports and two or more output ports that is usually called 1xN or NxN optical switch.

Performance Parameters of Optical Switch

The quality of optical switches depends on fast switching speed, high isolation, low insertion loss, insensitivity to polarization and reliability. The applications in different fields have different requirements for its parameters. Main characteristic parameters of optical switches:

1. Insertion Loss

2. Return Loss: the ratio of the optical power returned from the input end to the input optical power.

3. Isolation: the ratio of the optical power of two isolated output ports.

4. Crosstalk: The ratio of the input optical power to the optical power output from the non-conducting port.

5. Extinction Ratio: The difference between the insertion loss of the two ports in the conducting and non-conducting states. ER=IL-IL0

6. Switching Time: The time required for the switch port to turn on or off from a certain initial state. Count from the moment when energy is applied or removed from the switch. Optical switches and optical amplification, optical signal storage, etc. are all optical device materials. The optical switch can be operated within picoseconds (10-12 seconds). At present, it is based on lithium niobate and gallium aluminum arsenic compound, formed from the electronics industry. Read more on Applications of Optical Switches.