With the gradual advancement of the national marine strategy, the deep-sea applications of optical fiber hydrophones have becoming more and more extensive with higher requirements of the reliability. Based on six basic technology platforms, HYC has launched a series of Michelson interferometers that can be used in deep sea hydrophones. The product line includes FRM (Faraday Rotating Mirror) and Coupler devices featuring ultra-miniaturized packing, ultra-high reliability. It is ideal for fiber optic interferometric sensor systems for deep-sea 5000m signal detection.
With the growth of global data volume, parallel optical technology is an important technical for the expansion of current data centers, and the optical transmission rate has continuously evolved from 10Gbps, 40Gbps, 100Gbps to 200Gbps, 400Gbps, and even 600Gbps, 800Gbps. At this year’s OFC conference, a number of Chinese suppliers have successively demonstrated 800G rate optical modules, which means that 800G will enter a new era.
What is parallel optics? Parallel optical technology is a special optical communication technology that transmits and receives signals at both ends of the link. Parallel optical transceiver modules are usually used to achieve high-speed signal transmission at both ends. Parallel optical technology is a cost-effective solution for 4×50G, 8×50Gbps transmission.
If you have ever been to data center, then you must have a deep understanding of the following cabling scenarios.
data center
If an optical circuit can improve such a cabling environment, are you interested?
Optical circuit
The optical fiber flex circuit is independently developed by HYC, which provides a solution of efficient routing, high-core number connection, and complete customization. It can be widely used in applications , including multi-core fiber cross transmission, switch equipment, optical backplane interconnection, card-to-card connection, rack-to-rack connection, wavelength selection switch, and high-density fiber management.
A single customized optical fiber flex circuit can replaces the complex bundled jumper connections, which can significantly save equipment space, improve the smoothness of airflow between equipment, and improve the working environment of sensitive components.
The optical circuit can realize the output/input of any connector, as well as direct connection or fusion of the connector; support single-mode/multi-mode and single-core/multi-core fiber. As long as it is designed in advance, it can theoretically support the connection of any number of cores and any polarity link.
Optical circuit
HYC’s optical fiber lines use environmentally friendly materials that meet the application of industrial environments, and perform insertion loss, return loss and polarity tests before leaving the factory to ensure that each product can meet the optical characteristic requirements and link polarity requirements designed by the customer. Some forms of products adopt high-efficiency fully automatic production machines, which not only improve production efficiency, but also make the products more compact and beautiful. Machine production can ensure that the direction of each line is accurate and the polarity is correct.
At present, HYC can provide three types of optical circuit, and customers can choose according to the applications, core number, environment, space and other requirements.
PLC is more known in the field of electronic technology. It is the acronym of the terminology ‘programmable logic controller’. However, in the field of optical communication, PLC is the acronym of another terminology, i.e. ‘planar lightwave circuit’, which is variable optical waveguide structures fabricated with integrated optics technologies. PLC technologies can implement functional devices as directional coupler (DC), Y-branch splitter, multimode interferometer (MMI), arrayed waveguide grating (AWG), optical interleaver (ITL), Mach-Zehnder (MZ) electro-optical modulator, thermo-optical variable optical attenuator (TO-VOA), thermo-optical switch (TO-SW), etc.
To understand the types of optical fibers, optical cables, jumpers, connectors, and adapters, you first need to know the relationship between these products.
This article will include these subject. What does WDM stand for? The basic structure of WDM system Advantages of WDM technology What does Mux and Demux stand for? The difference between WDM and optical splitter The indicators that affect the WDM devices How to understand the O, E, S, C, L, U band What does CWDM stand for vs. DWDM, FWDM, LWDM, MWDM?
What does WDM stand for? Wavelength Division Multiplexing(WDM) is one of the most common way of using wavelengths to increase bandwidth by multiplexing various optical carrier signals onto a single optical fiber. It combines a series of optical carrier signals with different wavelengths carrying various information and coupled to the same optical fiber for transmission at the transmitting end. At the receiving end, optical signals of various wavelengths are separated by a demultiplexer. This technique of simultaneously transmitting two or many different wavelengths in the same fiber is called wavelength division multiplexing, or WDM.
With the development of ultra-high-speed and integrated optical communications, optical transceiver modules are also expected to adopt smaller and more integrated solutions, which have high demand for parallel high-speed optical subassembly. Due to the high cost caused by strict material usage and processing technology, the optical fiber array has not been widely used for 10G transmission. With the rapid advance of 400G and 800G high-speed transmission, FA with high-density packaging can be said to be a more ideal solution.
Optical fiber arrays are most commonly used in the packaging of planar optical waveguide splitters (PLC) and arrayed waveguide gratings (AWG). With the explosive growth of data flow, the demand for optical fiber arrays in data centers and 5G commercial applications is growing rapidly, and FA has become more and more widely used in MEMS systems, sensors, silicon photonics and other fields.
Distributed optical fiber sensing technology Optical fiber sensing technology is a new type of sensing technology that developed rapidly with the development of optical fiber communication technology in the 1970s. It uses light waves as a carrier and optical fiber as a medium to sense and transmit external measured signals. Compared with conventional sensors, optical fiber sensors have many advantages such as high measurement sensitivity, anti-electromagnetic interference, anti-radiation, high pressure resistance, corrosion resistance, small size, light weight, and adaptation to harsh environments. The optical fiber component itself is both a detection element and a transmission element , which can connect many optical fiber sensing units on the optical fiber trunk to form a large-scale remote sensing system for distributed monitoring and measurement.
Introduction In recent years, the integrated optical passive devices are smaller in size and more mature in technology, occupying a considerable part of the market share. As one of the key devices of optical communication, erbium-doped fiber amplifier (EDFA) has become the technical focus of competition among many manufacturers due to its integration, miniaturization, multi-function and low cost. The integration of hybrid optical passive devices is not to use integrated technology to make devices, but to integrate separate devices together. The above competitive advantages of EDFA can be realized by integrating optical isolator, wavelength division multiplexing (WDM) devices, optical circulator and test access port (TAP) splitter into a hybrid device. At the same time, the manufacturing process of hybrid optical passive devices is also one of the key factors to realize the competitive advantage of the above-mentioned EDFA technology.
In the Passive Optical Devices for 5G Application(Part II), we introduce Tunable Optical Filter (TOF) for Coherent Receiving, Optical Performance Monitoring (OPM) Module, Optical Channel Monitoring (OCM) Module. This article will show you other important passive optical devices for 5G application.
Dynamic Gain Equalization (DGE) Filter For the complicated fiber links transmitting DWDM signals, OPM and OCM just provide solutions for monitoring of OSNR and channels. However, the DWDM signals need to be equalized before they leave each ROADM node or relay station. In the ROADM-based optical network, the power levels of the DWDM channels are always changing. Thus DGE is required to provide dynamic equalization of the DWDM channels, which is different from the fixed GFF (Gain Flattening Filter) for an EDFA.
Optical Passive Components 