Laser Focus World is an industry bedrock—first published in 1965 and still going strong. We publish original articles about cutting-edge advances in lasers, optics, photonics, sensors, and quantum technologies, as well as test and measurement, and the shift currently underway to usher in the photonic integrated circuits, optical interconnects, and copackaged electronics and photonics to deliver the speed and efficiency essential for data centers of the future.

Our 80,000 qualified print subscribers—and 130,000 12-month engaged online audience—trust us to dive in and provide original journalism you won’t find elsewhere covering key emerging areas such as laser-driven inertial confinement fusion, lasers in space, integrated photonics, chipscale lasers, LiDAR, metasurfaces, high-energy laser weaponry, photonic crystals, and quantum computing/sensors/communications. We cover the innovations driving these markets.

Laser Focus World is part of Endeavor Business Media, a division of EndeavorB2B.

Laser Focus World Membership

Never miss any articles, videos, podcasts, or webinars by signing up for membership access to Laser Focus World online. You can manage your preferences all in one place—and provide our editorial team with your valued feedback.

Magazine Subscription

Can you subscribe to receive our print issue for free? Yes, you sure can!

Newsletter Subscription

Laser Focus World newsletter subscription is free to qualified professionals:

The Daily Beam

Showcases the newest content from Laser Focus World, including photonics- and optics-based applications, components, research, and trends. (Daily)

Product Watch

The latest in products within the photonics industry. (9x per year)

Bio & Life Sciences Product Watch

The latest in products within the biophotonics industry. (4x per year)

Laser Processing Product Watch

The latest in products within the laser processing industry. (3x per year)

Get Published!

If you’d like to write an article for us, reach out with a short pitch to Sally Cole Johnson: [email protected]. We love to hear from you.

Photonics Hot List

Laser Focus World produces a video newscast that gives a peek into what’s happening in the world of photonics.

Following the Photons: A Photonics Podcast

Following the Photons: A Photonics Podcast dives deep into the fascinating world of photonics. Our weekly episodes feature interviews and discussions with industry and research experts, providing valuable perspectives on the issues, technologies, and trends shaping the photonics community.

Editorial Advisory Board

  • Professor Andrea M. Armani, University of Southern California
  • Ruti Ben-Shlomi, Ph.D., LightSolver
  • James Butler, Ph.D., Hamamatsu
  • Natalie Fardian-Melamed, Ph.D., Columbia University
  • Justin Sigley, Ph.D., AmeriCOM
  • Professor Birgit Stiller, Max Planck Institute for the Science of Light, and Leibniz University of Hannover
  • Professor Stephen Sweeney, University of Glasgow
  • Mohan Wang, Ph.D., University of Oxford
  • Professor Xuchen Wang, Harbin Engineering University
  • Professor Stefan Witte, Delft University of Technology

GBT Technologies Inc (OP:GTCH)

0.0002 UNCHANGED
Streaming Delayed Price Updated: 3:52 PM EDT, Oct 10, 2025 Add to My Watchlist

Historical Prices

Date Open High Low Close Volume Change (%)
Oct 10, 2025 0.0001 0.0002 0.0001 0.0002 64,393,628 +0.00(+0.00%)
Oct 09, 2025 0.0001 0.0002 0.0001 0.0002 52,267,528 +0.00(+100.00%)
Oct 08, 2025 0.0001 0.0002 0.0001 0.0001 25,867,340 -0.00(-50.00%)
Oct 07, 2025 0.0002 0.0002 0.0001 0.0002 5,950,001 +0.00(+0.00%)
Oct 06, 2025 0.0001 0.0002 0.0001 0.0002 69,427,672 +0.00(+0.00%)
Oct 03, 2025 0.0002 0.0002 0.0001 0.0002 70,413,016 +0.00(+0.00%)
Oct 02, 2025 0.0002 0.0002 0.0001 0.0002 23,110,000 +0.00(+0.00%)
Oct 01, 2025 0.0002 0.0002 0.0001 0.0002 31,741,860 +0.00(+0.00%)
Sep 30, 2025 0.0001 0.0002 0.0001 0.0002 32,641,726 +0.00(+0.00%)
Sep 29, 2025 0.0002 0.0002 0.0001 0.0002 55,100,108 +0.00(+0.00%)
Sep 26, 2025 0.0002 0.0002 0.0001 0.0002 20,142,944 +0.00(+0.00%)
Sep 25, 2025 0.0002 0.0002 0.0001 0.0002 13,850,583 +0.00(+0.00%)
Sep 24, 2025 0.0002 0.0002 0.0001 0.0002 183,041,840 +0.00(+0.00%)
Sep 23, 2025 0.0002 0.0002 0.0001 0.0002 37,344,228 +0.00(+0.00%)
Sep 22, 2025 0.0002 0.0002 0.0001 0.0002 68,627,296 +0.00(+0.00%)
Sep 19, 2025 0.0002 0.0002 0.0001 0.0002 224,072,784 +0.00(+0.00%)
Sep 18, 2025 0.0002 0.0002 0.0001 0.0002 69,838,760 +0.00(+0.00%)
Sep 17, 2025 0.0002 0.0002 0.0001 0.0002 260,854,112 +0.00(+0.00%)
Sep 16, 2025 0.0001 0.0002 0.0001 0.0002 64,801,088 +0.00(+0.00%)
Sep 15, 2025 0.0002 0.0002 0.0001 0.0002 200,562,736 +0.00(+0.00%)
Sep 12, 2025 0.0002 0.0002 0.0001 0.0002 67,260,848 +0.00(+0.00%)
Sep 11, 2025 0.0002 0.0002 0.0001 0.0002 43,169,048 +0.00(+0.00%)
Sep 10, 2025 0.0002 0.0002 0.0001 0.0002 78,660,648 +0.00(+0.00%)
Sep 09, 2025 0.0001 0.0002 0.0001 0.0002 47,004,116 +0.00(+0.00%)
Sep 08, 2025 0.0002 0.0002 0.0001 0.0002 53,925,820 +0.00(+0.00%)
Sep 05, 2025 0.0002 0.0002 0.0001 0.0002 66,815,708 +0.00(+0.00%)
Sep 04, 2025 0.0002 0.0002 0.0001 0.0002 53,346,632 +0.00(+0.00%)
Sep 03, 2025 0.0001 0.0002 0.0001 0.0002 101,853,152 +0.00(+0.00%)
Sep 02, 2025 0.0002 0.0002 0.0001 0.0002 96,817,704 +0.00(+0.00%)
Aug 29, 2025 0.0002 0.0002 0.0001 0.0002 83,627,832 +0.00(+0.00%)
Aug 28, 2025 0.0002 0.0002 0.0001 0.0002 68,400,752 +0.00(+0.00%)
Aug 27, 2025 0.0002 0.0002 0.0001 0.0002 97,319,696 +0.00(+0.00%)
Aug 26, 2025 0.0002 0.0002 0.0001 0.0002 163,503,920 +0.00(+0.00%)
Aug 25, 2025 0.0002 0.0002 0.0001 0.0002 201,935,520 +0.00(+0.00%)
Aug 22, 2025 0.0002 0.0002 0.0001 0.0002 111,973,928 +0.00(+100.00%)
Aug 21, 2025 0.0002 0.0002 0.0001 0.0001 147,834,768 -0.00(-50.00%)
Aug 20, 2025 0.0002 0.0002 0.0001 0.0002 436,264,384 +0.00(+100.00%)
Aug 19, 2025 0.0002 0.0002 0.0001 0.0001 189,394,784 -0.00(-50.00%)
Aug 18, 2025 0.0002 0.0002 0.0001 0.0002 177,246,528 +0.00(+0.00%)
Aug 15, 2025 0.0002 0.0002 0.0001 0.0002 139,495,744 +0.00(+0.00%)
Aug 14, 2025 0.0002 0.0002 0.0001 0.0002 116,485,968 +0.00(+0.00%)
Aug 13, 2025 0.0001 0.0002 0.0001 0.0002 248,816,256 +0.00(+0.00%)
Aug 12, 2025 0.0003 0.0003 0.0001 0.0002 853,953,088 -0.00(-33.33%)
Aug 11, 2025 0.0001 0.0003 0.0001 0.0003 2,058,767,360 +0.00(+200.00%)
Aug 08, 2025 0.0001 0.0001 0.0001 0.0001 14,428,000 +0.00(+0.00%)
Aug 07, 2025 0.0001 0.0001 0.0001 0.0001 29,991,840 +0.00(+0.00%)
Aug 06, 2025 0.0001 0.0001 0.0001 0.0001 29,703,588 +0.00(+0.00%)
Aug 05, 2025 0.0001 0.0001 0.0001 0.0001 68,401,400 +0.00(+0.00%)
Aug 04, 2025 0.0001 0.0002 0.0001 0.0001 129,281,472 +0.00(+0.00%)
Stock Quote API & Stock News API supplied by www.cloudquote.io
Quotes delayed at least 20 minutes.
By accessing this page, you agree to the following
Privacy Policy and Terms Of Service.