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.

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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

Rafael Holdings, Inc. Class B Common Stock (NY:RFL)

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Historical Prices

Date Open High Low Close Volume Change (%)
Oct 08, 2025 1.340 1.370 1.320 1.350 49,400 +0.04(+3.05%)
Oct 07, 2025 1.380 1.380 1.310 1.310 122,806 -0.03(-2.24%)
Oct 06, 2025 1.350 1.360 1.330 1.340 128,732 -0.04(-2.90%)
Oct 03, 2025 1.360 1.419 1.360 1.380 50,811 +0.02(+1.47%)
Oct 02, 2025 1.400 1.446 1.350 1.360 82,082 -0.03(-2.16%)
Oct 01, 2025 1.400 1.400 1.360 1.390 58,653 +0.03(+2.21%)
Sep 30, 2025 1.340 1.390 1.340 1.360 63,402 -0.01(-0.73%)
Sep 29, 2025 1.400 1.465 1.360 1.370 104,784 +0.01(+0.74%)
Sep 26, 2025 1.350 1.390 1.340 1.360 62,748 +0.00(+0.00%)
Sep 25, 2025 1.400 1.400 1.340 1.360 72,935 -0.05(-3.55%)
Sep 24, 2025 1.460 1.460 1.410 1.410 29,963 -0.05(-3.42%)
Sep 23, 2025 1.510 1.520 1.400 1.460 143,212 -0.05(-3.31%)
Sep 22, 2025 1.440 1.530 1.430 1.510 169,976 +0.07(+4.86%)
Sep 19, 2025 1.690 1.690 1.290 1.440 756,575 -0.18(-11.11%)
Sep 18, 2025 1.530 1.700 1.480 1.620 719,056 +0.21(+14.89%)
Sep 17, 2025 1.440 1.470 1.350 1.410 150,425 -0.01(-0.70%)
Sep 16, 2025 1.330 1.476 1.325 1.420 219,389 +0.09(+6.77%)
Sep 15, 2025 1.420 1.420 1.310 1.330 180,085 -0.01(-0.75%)
Sep 12, 2025 1.340 1.370 1.320 1.340 161,098 +0.01(+0.75%)
Sep 11, 2025 1.360 1.437 1.330 1.330 101,561 +0.00(+0.00%)
Sep 10, 2025 1.500 1.510 1.320 1.330 121,098 -0.11(-7.64%)
Sep 09, 2025 1.350 1.440 1.320 1.440 179,149 +0.10(+7.46%)
Sep 08, 2025 1.450 1.450 1.300 1.340 265,819 -0.10(-6.94%)
Sep 05, 2025 1.490 1.490 1.410 1.440 78,215 -0.01(-0.69%)
Sep 04, 2025 1.540 1.540 1.430 1.450 105,427 -0.07(-4.61%)
Sep 03, 2025 1.380 1.520 1.370 1.520 190,631 +0.14(+10.14%)
Sep 02, 2025 1.380 1.442 1.352 1.380 144,851 -0.09(-6.12%)
Aug 29, 2025 1.520 1.540 1.450 1.470 90,224 -0.06(-3.92%)
Aug 28, 2025 1.530 1.570 1.460 1.530 106,465 +0.03(+2.00%)
Aug 27, 2025 1.550 1.610 1.494 1.500 100,271 -0.03(-1.96%)
Aug 26, 2025 1.450 1.546 1.450 1.530 92,815 +0.06(+4.08%)
Aug 25, 2025 1.560 1.560 1.445 1.470 80,359 -0.09(-5.77%)
Aug 22, 2025 1.530 1.580 1.470 1.560 76,908 +0.11(+7.59%)
Aug 21, 2025 1.450 1.480 1.410 1.450 78,188 -0.01(-0.68%)
Aug 20, 2025 1.500 1.542 1.440 1.460 70,185 -0.02(-1.35%)
Aug 19, 2025 1.490 1.590 1.450 1.480 161,282 -0.07(-4.52%)
Aug 18, 2025 1.650 1.660 1.550 1.550 56,814 -0.10(-6.06%)
Aug 15, 2025 1.670 1.670 1.630 1.650 17,617 +0.04(+2.48%)
Aug 14, 2025 1.650 1.660 1.610 1.610 40,017 -0.05(-3.01%)
Aug 13, 2025 1.600 1.680 1.600 1.660 29,625 +0.02(+1.22%)
Aug 12, 2025 1.600 1.680 1.600 1.640 63,167 +0.02(+1.23%)
Aug 11, 2025 1.660 1.670 1.600 1.620 45,634 +0.00(+0.00%)
Aug 08, 2025 1.650 1.710 1.610 1.620 52,001 -0.06(-3.57%)
Aug 07, 2025 1.690 1.710 1.650 1.680 24,841 +0.01(+0.60%)
Aug 06, 2025 1.700 1.720 1.650 1.670 45,371 -0.02(-1.18%)
Aug 05, 2025 1.730 1.760 1.670 1.690 72,563 -0.05(-2.87%)
Aug 04, 2025 1.750 1.780 1.730 1.740 30,312 -0.01(-0.57%)
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