Test & Measurement

The team’s experimental setup in an elevator: An optical fiber spool is kept within an enclosure for temperature control, while the white case insulates the optical fiber and all other fiber-optic components from the environment.
Researchers’ experimental results show photons interact with Earth’s gravitational field in ways that exert a subtle influence on the speed of light.
May 5, 2026
Credit: Urban Senica
3D illustration of the team’s device, in which an external microwave signal induces gain modulation along the entire semiconductor laser to generate widely tunable modelocked pulses/frequency combs.
May 4, 2026
FIGURE 1. Comparison of laser frequency deviation: The unlocked laser (gray) exhibits significant environmental drift, while the analog lock (blue) suppresses most of this noise but is limited by hardware-induced drift and component tolerances. The digital implementation (green) leverages high-speed DSP to achieve a near-zero error signal and provide the superior stability required.
April 29, 2026
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Following the Photons: A Photonics Podcast
April 28, 2026
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Following the Photons: A Photonics Podcast
April 14, 2026
Credit: E. Joseph et al., Adv. Mater. Technol., 11, 2, e01461 (2026); https://doi.org/10.1002/admt.202501461
Design of BIOPIX polymer pixel arrays. a) Left: A schematic of the BIOPIX device architecture featuring a 2 × 2 polymer pixel array. Right: A photograph of a 2 × 2 BIOPIX device. b) Left: Schematic of the BIOPIX device architecture with a 4×4 polymer pixel array. Right: Photograph of a 4 × 4 BIOPIX device.
April 14, 2026
Credit: M. King/NIST
NIST scientist Nikolai Klimov holds a PIC with tweezers.
April 8, 2026
FIGURE 1. A schematic comparison of a conventional semiconductor laser and a QCL.
March 31, 2026
Credit: Bloom Lasers
Every manufacturing step to build a Bloom laser is accompanied by measurements from the beam propagation system.
March 20, 2026

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