The Light-Link is an "HDMI over Fiber" cable that sends the video information through optical fiber. Because it uses fiber, it can send the signal instantly with no perceptible latency at longer distances than regular copper HDMI cables. It also can send much higher resolutions up to 8K at these distances due to the high data throughput of fiber.

How it Works

The converters inside the cable heads convert incoming electrical signal into optical on one end, and back into electrical on the other end. The Light-Link is composed of fiber cables and copper cables. The copper cables are used for non-video information such as hot plug detection, grounding, and +5v power. The fiber strands carry all the video information.

The light travels down the fibers using internal reflection, which allows the light to bounce off the cable walls similar to a bobsled. Light travels extremely fast (186,000 miles a second) so the signal arrives almost instantly without losing any quality.

Better than copper

According to HDMI.org "The longest HDMI cable runs seen to date have been achieved using fiber-optic cable, which is far less susceptible to attenuation and interference than copper. Electrically it is similar to an active cable or Cat 5/6 solution, the principal difference being the higher-quality optical cabling between the transmit and receive connectors. HDMI over fiber is a highly robust solution, effective in cable runs up to 100 meters or more."

Easier than any HDMI extender

Since the optical converters are housed inside the heads of the cable, there is no need for any external repeaters. This also means that there is no need for extra power adapters or patch cables.

The Light-Link eliminates possible points of failure. In a typical HDMI extender setup with baluns you have a total of eight connections:

x4 HDMI connections - video source to sender balun and receiver balun to display.
x2 RJ45 connections - transmitter balun to receiver balun.
x2 power connections - from baluns to power outlets.

That's eight possible things that can get unplugged, plugged in the wrong way, or become defective. With the Light-Link you only have one cable that can be easily verified end to end. Troubleshooting is incredibly easy compared to any other setup.

Specifications

48 Gbps
8K @ 60Hz
4K @120Hz
HDMI 2.1
HDCP 1.4/2.0/2.2
Compatible with ARC and CEC
Operating Temperature -20℃ to 80℃ ± 5℃
Recommended minimum bend radius is about 4 cm when not under tension or about 8 cm when under tension.

8K HDMI Cables

Sewell Light-Link Fiber Optic 8K HDMI 2.1 Cable - 48Gbps High Speed

Sewell 8K HDMI 2.1 Cable - 48Gbps 4K 120Hz,144Hz, 165Hz for PC, Blu-Ray, PS5 & Xbox