1x16 LGX PLC Splitter

PLC splitter is a type of optical power management device that is fabricated using silica optical waveguide technology. Wolon provides whole series of 1xN and 2xN splitter products that are tailored for specific applications. All products meet GR-1209-CORE and GR-1221-CORE requirements.

Good uniformity and low insertion loss

Low Polarization Dependent Loss

Excellent Environmental Stability

Excellent Mechanical

Stability Telcordia GR-1221 and GR-1209

Advantage: Compact design, Easy to install in distribution box

Note: UPC Connectors: IL add 0.2 dB, APC Connectors: IL add 0.3 dB.

PLC (optical splitter) technology and what are the production process?

PLC is more widely known in the field of electronics technology, it is the programmable logic controller (Programmable Logic Controller) for short. In the field of optical communication technology, PLC is the abbreviation for Planar Lightwave Circuit, which is based on integrated optical technology to prepare a variety of optical waveguide structure, in technology, the functional devices that can be realized are directional coupler DC, Y brancher, multimode interference coupler MMI, array waveguide grating AWG, optical comb filter ITL, Mach Zendel MZ electro-optical modulator, thermo-optical tunable attenuator TO-VOA, thermo-optical switch TO-SW, etc.

In the optical communication industry, PLC devices that are widely used include optical splitter, AWG, MZ electro-optical modulator, TO-VOA, etc. Among them, optical splitter is a splitting device based on Y-branch series-parallel connection, for example, a 1×16-port optical splitter requires 15 Y-branchers. AWG is a 1×N-port device, which can separate the input dozens of wavelengths into different output ports. The MZ modulator based on lithium niobate optical waveguide is the most mainstream modulator solution, while the silicon optical modulator technology has matured and become the preferred solution for high-speed modulators above 50G. The combination of PLC-based TO-VOA and AWG constitutes a wavelength division multiplexer/demultiplexer VMUX module with channel equalization function.

There are various optical communication devices based on PLC technology that are widely used, but in the industry, PLC usually refers to optical splitter, which is an optical passive device most used in FTTH networks. After the Internet bubble in 2000, the optical communication industry entered a recession; around 2004, Japan took the lead in investing in FTTH as an infrastructure before the application scenario emerged; after 2008, with China's entry, FTTH construction reached a peak around 2012. FTTH usually uses passive optical network PON, the core of which is PLC optical splitters, which are widely laid in various commercial buildings and residences. In the life experience, the closest to us is that the "cat" tail of the home modem, upgraded from the early twisted-pair cable to the current fiber optic patch cord, is led from the PLC optical splitter of a port, fiber to the home can usually support 100-200M network speed, which is much higher than the cable can support This is much higher than the 4M transmission rate that cable can support.

Optical splitter (PLC) production process

In the field of optical communication, PLC is short for planar optical circuit, which is based on the integration of optical technology to prepare a variety of optical waveguide structures to achieve a functional device. There are four main processes for the preparation of optical waveguides: ion exchange, ion injection, chemical vapor deposition and flame hydrolysis.

1) Ion exchange

The principle of the ion exchange process is to immerse the glass material containing A+ ions in a solution containing B+ ions, using the nature of the ions will diffuse from the region of high concentration to the region of low concentration, the B+ ions in the solution to exchange out the A+ ions in the glass. Since the glass material containing A+ ions has a higher refractive index than the glass material containing B+ ions, the desired optical waveguide structure is obtained by obtaining a high refractive index in the region where ion exchange occurs as the core layer of the optical waveguide, and the region where ion exchange does not occur as the cladding layer of the optical waveguide.

The general process flow for preparing optical waveguides by ion exchange is shown in Figure 1.

1) Covering a mask layer on the glass substrate by vapor deposition or sputtering process.

2) A window of waveguide structure is opened in the mask layer by photolithography and etching process.

3) Immersing the glass material with the prepared mask layer and open window in a solution for ion exchange.

4) The exchange ions distributed in the surface layer are driven by electric field to a certain depth to form the waveguide structure.

In the actual process, to better ensure the ion exchange effect, the above two steps 3-4 need to be carried out simultaneously, which depends on the specific process design.

PLC (optical splitter) technology and fabrication process

Figure 1. Process flow of optical waveguide preparation by ion exchange

In order to improve the ion exchange efficiency and obtain good optical waveguide properties, it is necessary to properly select two mutually exchanged ions, optimize the glass formulation, control the concentration and temperature of the solution, and apply the electric field appropriately.

2) Ion injection

Ion injection is a material surface modification technique that belongs to a standard processing process in the semiconductor industry. Ion injection into optical waveguides is done by accelerating ions to high energies of tens to hundreds of thousands of electron volts through an ion gas pedal, bombarding the surface of the substrate material, causing damage or defects on the material surface through the interaction between atoms or molecules, changing the refractive index and forming the optical waveguide structure.

A typical ion implantation process for preparing optical waveguides is shown in Figure 2. The ion implantation machine usually consists of an ion source, ion extraction and pre-acceleration, magnetic analyzer, back channel gas pedal, electron scanning system, ion implantation cavity and vacuum system. In the cavity of the ion source, ions generated by gas discharge; are exported and pre-accelerated by the electrodes in the ion extractor; the magnetic analyzer controls the quality of the ion beam to obtain a well-directed ion beam; and the ion beam, accelerated by the back channel, is injected into the sample in the cavity under the control of the electron deflector.

PLC (optical splitter) technology and the full list of fabrication processes

Figure 2. Process of preparing optical waveguide by ion implantation

The substrate material placed in the ion implantation cavity needs to be pretreated to prepare the mask layer according to the optical waveguide pattern. After ion implantation, post-processing, such as annealing process, is required to reduce the impact of material defects on the loss generated by the implantation.

3) Chemical vapor deposition

Chemical vapor deposition CVD process is also a standard process in the semiconductor industry. The flow of CVD process to prepare optical waveguide is shown in Figure 3, which is to successively deposit optical waveguide layers with different doping layers on silicon substrate (or quartz substrate), such as core layer by doping phosphorus and boron to improve refractive index, and cladding layer by doping germanium to reduce refractive index. After depositing the core layer and before depositing the cladding layer, a mask layer needs to be prepared by a photolithography process to define the optical waveguide pattern. After each layer is deposited, an annealing and hardening process is required to enhance the denseness and uniformity of the deposited layers and to reduce stress.

PLC (optical splitter) technology and fabrication process

Figure 3. Process flow of optical waveguide preparation by chemical vapor deposition

(4) Flame hydrolysis method

The process flow of FHD is similar to that of CVD, but the difference lies in the process conditions for generating the thin film layer. various doping elements such as phosphorus, boron, germanium halides, pass into the gas burner, and chemically react with water in a high temperature flame to produce a thin film layer of silicon dioxide doped with various impurity elements.

5) Process comparison

The ion exchange and ion injection processes can prepare low-cost optical waveguides, but the control of waveguide cross-sectional shape is slightly worse, mainly used to make optical splitters, where the ion injection process is much more efficient than ion exchange. FHD is more favorable than CVD for the preparation of thick films.

1. CATV

2. Active device termination

3. Telecommunication networks

4. Metro

5. Local area network(LANs)

6. Data Processing networks

7. Test equipment

8. Premise installations

9. Wide  area networks(WANs)

Q1: Is it all right to make customer's own brand name?

A: Yes, your own brand name authorization is required.

Q2: Are you a manufacturer or trading company?

A: 12 years manufacturer.

Q3: Can you do the design for us?

A: Yes, OEM or ODM is available.

Q4: How can I get a sample to check your quality?

A: 1-2 pieces free sample will be offered for test.

Q5: Is the sample free，and How long can I expect to get the sample?   

A: 1 pieces free, 3 days delivery for sample.

Q6: Packaging & Shipping:  

A: Carton & Shipping by express or sea.

Q7: What about the lead time for mass production?

A: 15-20 working days.

Q8: What is your terms of delivery?

A: EXW Wuhan.

Q9: What kind of files do you accept ?

A: PDF is preferred

Q10: What's your payment term?

A: T/T, Western Union, and Alibaba Trade Assurance.

Q11: When can I get the price?

A: Usually within 2 hours, complex questions we will check with engineer and reply within 3 working days.

Q12: Where is your company?

A: Wuhan Hubei.

Q13: Where is your loading port?

A: Shanghai, Shenzhen or other ports assigned by you.

Q14: How soon we can get email response from your team?

A: Usually within 2 hours, complex questions we will check with engineer and reply within 3 working days.

Q15: If we have some other product requirements that your page don't include, can you help to supply?

A: Yes, we are there to offer one stop solution.

Q16: Does your product have warranty service? How long is the warranty period?

A: Yes, 1 year.

Q17: How long is the delivery period of the product?

A: 3 days for samples, large quantity order depends on the detailed purchase quantity.

Q18: What quality certifications do you have?

A: ISO9001, Patent certificate, Computer Software Copyright Registration Certificate, CE and RoHS.

Q19 What kind of package for single product you can offer?

A: Poly bag, plastic blister for your choices.

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