Optical multiplexers (muxes) and demultiplexers (demuxes) form the foundation of DWDM networks deployed by the telecommunications industry. In addition to their use at terminal points, mux/demux components are also used as building blocks of advanced network elements such as optical add/drop multiplexers (OADMs) and optical-crossconnect switches.
This post talks about different mux technologies currently used in the industry.
Thin-film filters (TFFs) were first used in low-count WDM systems. TFFs function by filtering wavelengths serially. The thin-film filter is designed to transmit a specific wavelength channel and reflect all other wavelengths. TFFs use concatenated interference filters, each of which is fabricated with a different set of dielectric coatings designed to pass a single wavelength. They work well for low channel counts but have limitations at higher channel counts due to size and accumulated insertion losses.
As DWDM systems expand beyond 40 channels, channel spacing becomes less than 50 GHz. A 50-GHz filter typically requires several hundred layers of coating to create narrow-band filters that can separate and isolate individual wavelengths. With so many layers being deposited, errors due to local film thickness variation and density alternation increase, reducing the yield of useful filters.
Enter AWGs. In contrast to TFFs, AWG devices use a parallel multiplexing approach that is more conducive to high-channel-count applications. AWGs are compact, single-stage filters that deploy planar waveguide technology. They consist of Free Propagation Regions (FPRs) and waveguides interconnecting the FPRs. The waveguides have different path lengths leading to constructive or destructive interferences in the output FPR, and therefore multiplexing/demultiplexing.
However, if the temperature of an AWG fluctuates, the channel wavelength will change according to the thermal coefficient of the material used.
Vitex offers athermal AWGs completely immune to extreme temperature variations making them ideal for outside plant applications.
The major advantages of an athermal AWG are that there is no need for power supply or temperature monitoring of the AWG device. In Vitex athermal AWGs, athermalization is achieved by mechanical compensation.
AWG Advantages & Applications
The key advantage of AWGs over TFFs is that their cost is not dependent on wavelength count making them extremely cost-effective for high channel count applications. The other advantage of the AWG is the flexibility in selecting channel numbers and spacing. As a result, various kinds of AWGs can be fabricated in a similar manner. Integration is another key benefit of AWG. Vitex offers integrated Mux/Demux modules and AWG based Optical Channel Monitors.
AWGs especially athermal AWGs are a great choice for cost-effective future proof communication networks. Our latest product, ultra-wideband AAWGs feature super flat tops to target 400-Gbps network applications. You can check out all our AWG products here.
If you have any questions, please contact Vitex at info@vitextech.com
Most recent headlines
05/01/2027
Worlds first 802.15.4ab-UWB chip verified by Calterah and Rohde & Schwarz to be ...
06/09/2026
June 9 2026, 23:00 (PDT) Dolby and MagentaTV Bring Fans Closer to the FIFA Worl...
04/08/2026
Dalet, a leading technology and service provider for media-rich organizations, t...
04/07/2026
April 7 2026, 19:00 (PDT) Detective Conan: Fallen Angel of the Highway Opens in...
15/06/2026
Detach from Direct-Attached: How Remote Editing with EVO Keeps Creative Teams Mo...
14/06/2026
Library captures 1960s R&B/pop drum sound
Following on from their recent wave of plug-in effects, Iconic Instruments have just launched an all-new virtual d...
14/06/2026
HBO Comedy Rooster Shot with URSA Cine 17K 65
Brie Clayton June 14, 2026
0 Comments
Large format brings viewers intimately close to characters.
Black...
13/06/2026
Latest expansion pack includes 252 presets
Devious Machines have recently introduced another expansion for their powerful multi-effects plug-in, Infiltrator...
13/06/2026
Create custom DAW/plug-in controllers using prompts
MetaGrid have recently introduced an all-new AI Builder function to their touchscreen-based control surf...
13/06/2026
Share
Copy link
Facebook
X
Linkedin
Bluesky
Email...
13/06/2026
Share
Copy link
Facebook
X
Linkedin
Bluesky
Email...
12/06/2026
YES Network and The Gotham Sports App will air seven Athletes Unlimited Softball...
12/06/2026
The United Football League will host its FAST Innovation Suite at the 2026 United Bowl presented by Credit One Bank on Saturday, June 13 at 3:00 p.m. ET at Audi...
12/06/2026
PTZOptics and LayerJot will present live demonstrations at InfoComm 2026 showing how natural-language AI prompting, robotic camera control, and on-device comput...
12/06/2026
MultiDyne Video and Fiber Optic Systems will exhibit at InfoComm 2026, featuring...
12/06/2026
Ateme has announced that Eurovision Services is using Ateme's software-based frame-rate conversion technology for international live event workflows. The de...
12/06/2026
Bitmovin and Simplestream have announced a partnership with Xperi to simplify the launch of OTT streaming services on TiVo OS smart TVs and devices. The collabo...
12/06/2026
Net Insight has announced that a multinational technology company is deploying a...
12/06/2026
MLB Players Inc., the business arm of the MLB Players Association, has announced a partnership with Athletes First to develop and sell brand partnerships across...
12/06/2026
Guntermann and Drunck (G&D) and VuWall have announced the CommandKeyboard-Advanc...
12/06/2026
Comcast Smart Solutions announces a new smart technology deployment with Major L...
12/06/2026
Elevation Worship completed the initial leg of its Elevation Nights 2026 tour ...
12/06/2026
AJA Video Systems has announced KONA IP25 support for Colorfront Transkoder and ...
12/06/2026
Audinate Group Limited (ASX: AD8) will exhibit at InfoComm 2026 (Booth C7321, Ce...
12/06/2026
Pac-12 Commissioner Teresa Gould has announced the appointment of Scott Adametz as Chief Technology Officer. The Pac-12 describes the hire as the first CTO appo...
12/06/2026
Grass Valley has announced AMPP Edge Live, a production system combining Grass Valley hardware, NVIDIA Blackwell GPU acceleration, and AMPP OS in a single platf...
12/06/2026
At one time a trailblazer with the launch of the Longhorn Network, the Universit...
12/06/2026
Ratings Roundup is a rundown of recent rating news and is derived from press rel...
12/06/2026
Chyron has announced PAINT 10.4, an update to its illustrated replay and sports ...
12/06/2026
SVP, Production, Mark Gross: With the new schedule, with not having every Sunday night, it has given us an opportunity to take a step back and reimagine what o...
12/06/2026
For Televisa Technical Engineering Manager Roberto N nez Ibarra and the small team of 12 technicians and two production personnel at the IBC things are already ...
12/06/2026
Simple Steps to Better Acoustics - Taming The Small Room
Most of us mix in spare rooms and small spaces, where the acoustics fight us at every turn. At Gear...
12/06/2026
Latest addition expands vintage-inspired effects palette
Meris' Ottobit pedal range draws its inspiration from vintage gaming consoles, and the latest a...
12/06/2026
Soundbox-based chamber strings series expanded
Sonora Cinematic have just announced the launch of the second instalment in their Soundbox-based chamber stri...
12/06/2026
Share
Copy link
Facebook
X
Linkedin
Bluesky
Email...
12/06/2026
Share
Copy link
Facebook
X
Linkedin
Bluesky
Email...
12/06/2026
AJA Announces KONA IP25 Integration with Colorfront Software
Brie Clayton June 12, 2026
0 Comments
Collaboration enables uncompressed SMPTE ST 2110 I/O ...
12/06/2026
URSA Cine 12K LF Used to Create Visuals for STUTS' K-Arena Concert
Brie Clayton June 12, 2026
0 Comments
Organic visuals projected on a giant scre...
12/06/2026
MTI FILM Acquires Mango New Edit, Expanding its Global Post-Production Services ...
12/06/2026
AI Point Tracking Speeds Up Complex VFX Tracks in Mocha Pro
Jessie Electa Petrov June 12, 2026
0 Comments
The 2026.5 release adds automatic point trac...
12/06/2026
Bitmovin, a provider of video streaming solutions, has partnered with Simplestream, a provider of OTT and broadcast solutions, and technology provider Xperi, to...
12/06/2026
Leostream Corporation, creator of the world-leading Leostream Remote Desktop Access Platform, today announced Jigsaw24, a leading B2B IT solutions provider wit...
12/06/2026
Share
Copy link
Facebook
X
Linkedin
Bluesky
Email...
12/06/2026
Share
Copy link
Facebook
X
Linkedin
Bluesky
Email...
12/06/2026
Share
Copy link
Facebook
X
Linkedin
Bluesky
Email...
12/06/2026
Share
Copy link
Facebook
X
Linkedin
Bluesky
Email...
12/06/2026
Share
Copy link
Facebook
X
Linkedin
Bluesky
Email...
12/06/2026
How Aussie indie games and screen are levelling up with IP 11 June 2026
Ari Harrison, Pro Jank Footy
Head of Games Joey Egger and Ari Harrison of Umbrella sha...
12/06/2026
AgentPerf from Artificial Analysis, the industry's first agentic AI benchmark, gives developers, enterprises and infrastructure providers a clear way to com...
Optical multiplexers (muxes) and demultiplexers (demuxes) form the foundation of DWDM networks deployed by the telecommunications industry. In addition to their use at terminal points, mux/demux components are also used as building blocks of advanced network elements such as optical add/drop multiplexers (OADMs) and optical-crossconnect switches.
