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GoPhotonics presents a comprehensive selection of high-performance fiber optic couplers engineered to deliver precise optical power splitting, wavelength multiplexing, and efficient signal distribution across a wide range of photonic applications. Designed for accuracy, stability, and low-loss operation, these couplers operate over key wavelength regions including 850 nm, 930 nm, 980 nm, 1060 nm, 1310 nm, 1550 nm, and 1585 nm, ensuring compatibility with various single-mode and polarization-maintaining fiber systems. Utilizing advanced fused fiber and reflective coupling technologies, they provide low insertion and excess loss, excellent uniformity, and minimal polarization-dependent loss for reliable optical performance in both broadband and narrowband systems.

Available in configurations such as 1 x 2, 1 x 9, and 2 x 2, with customizable coupling ratios and port options, GoPhotonics’ fiber optic couplers support multiple fiber types, including SMF-28, Panda PM, chalcogenide, and polycrystalline IR fibers. They can be equipped with FC/PC, FC/APC, SC/APC, SC/UPC, or SMA connectors and are offered in compact, ruggedized, and cryogenic-compatible housings to suit laboratory, industrial, and OEM integration. Engineered for precision and environmental stability, these couplers ensure efficient light management across diverse applications. Ideal for use in optical coherence tomography (OCT), wavelength-division multiplexing (WDM), fiber laser systems, FTTH and LAN networks, process monitoring, and remote sensing applications.

LN-Cooled Dewar Couplers - Fiber Optic Coupler for Temperature Sensing Applications

The LN-Cooled Dewar Couplers from art photonics are fiber optic couplers designed for efficient optical coupling in cryogenic detection systems. They are available in two versions: a lens refocusing coupler and a mirror refocusing coupler. The lens version employs a ZnSe lens with anti-reflective coatings optimized for 3 µm - 5 µm and 8 µm - 12 µm wavelength ranges, ensuring effective transmission across mid- and long-wave infrared bands. The mirror version utilizes pre-aligned parabolic mirrors to eliminate chromatic aberrations and includes a purging feature to minimize atmospheric interference during spectral analysis. The couplers allow precise alignment with angular and translational adjustments, providing flexibility for optimal beam focusing. They support infrared fiber cables compatible with SMA or FC/PC connectors and can be used with chalcogenide and polycrystalline IR fibers for efficient coupling to MCT or InSb detectors inside LN-cooled Dewars. These couplers are designed to ensure stable optical performance and high-quality signal transfer in demanding measurement environments. They are ideal for process control, remote temperature sensing, and remote imaging applications.

EXTENDED WIDEBAND OCT COUPLER (EWOC) - Fused Fiber Optic Couplers for OCT Applications

The EXTENDED WIDEBAND OCT COUPLER (EWOC) from G&H is an extended wideband fused fiber optic coupler that operates at wavelengths of 850 nm, 1060 nm, and 1310 nm. It offers a wide operational bandwidth of ±100 nm with multiple coupling ratios including 90/10, 80/20, 75/25, 70/30, 67/33, 60/40, and 50/50, providing flexibility for various optical configurations. This coupler ensures low excess loss, with maximum values of 0.3 dB at 850 nm and 0.15 dB at 1060 nm and 1310 nm, and maintains precise coupling ratio tolerances ranging from ± 3 % to ± 6.5 % at 850 nm and ± 2.5 % to ± 5 % at 1060 nm and 1310 nm. It features fused fiber technology for high stability and performance over an extended spectral range and supports 1 x 2 or 2 x 2 port configurations. The coupler is compatible with OFS/Furukawa, Nufern, or Corning single-mode fibers and is available with FC/PC, FC/APC, SC/APC, FC/UPC, or SC/UPC connectors. It is offered in regular, slim, semi-ruggedized, and fully ruggedized housing options to suit different integration needs. It is ideal for use in optical coherence tomography (OCT) light engines to form interferometers used in generating depth-resolved imaging data.

C9903-S - Fiber Optic Couplers for FTTH & LAN Applications

The C9903-S from WDMQuest is a 1 x 9 tap-coupler module that operates at wavelengths of 1310 nm and 1550 nm. It features a tap ratio of 30/70 and a coupler ratio of 50/50, allowing one input to be split into nine outputs while maintaining defined power allocation. It delivers low insertion loss and very low excess loss to preserve signal strength, and it maintains minimal polarization-dependent loss (PDL) and high optical return loss for excellent signal integrity. It is designed for single-mode fiber operation and exhibits high environmental stability and reliability to support consistent performance in field or lab systems. It is available in multiple connector or termination styles and grades to suit network and instrumentation applications. It is ideal for use in optical communication, local area network, FTTH & LAN, HFC, and fiber sensor applications.

TW930R2A1 - Single-Mode Fiber Optic Coupler for OCT Applications

The TW930R2A1 from Thorlabs Inc. is a 1 x 2 wideband fused single-mode fiber optic coupler that operates at a wavelength of 930 nm. It provides a 90:10 coupling ratio, ensuring efficient power distribution between the output and tap ports. The device offers low insertion loss and minimal excess loss, maintaining stable performance across its operating bandwidth. It exhibits low polarization-dependent loss and high optical return loss, ensuring signal integrity and reducing unwanted reflections. Designed for single-mode operation, it supports optical power levels suitable for both connectorized and spliced configurations. It is available with FC/APC connectors and can be customized with different fiber types or connector options to meet specific system requirements. It is ideal for use in optical coupling, signal monitoring, OCT systems, and single-mode fiber instrumentation.

F-WDM-S98158-FCAPC - Fiber Optic Coupler for Multiplexing Applications

The F-WDM-S98158-FCAPC from MKS | Newport is a 1 x 2 wavelength-division multiplexer that operates at wavelengths of 980 nm and 1585 nm. It is designed for single-mode fiber and uses fused-fiber technology to separate or combine the two spectral channels with a bandwidth of ±10 nm for the 980 nm channel and ±15 nm for the 1585 nm channel. It exhibits a typical insertion loss of 0.3 dB and an isolation or cross-talk value of 14 dB, ensuring efficient signal routing with minimal unwanted coupling. It is rated for use in high humidity environments (90 – 95 %) and is accommodated in package type A with FC/APC connector termination. It is available with FC/APC connectors and pigtails from the manufacturer, and can be integrated into fiber-optic systems with standard single-mode fiber interfaces. It is ideal for bidirectional communications, pump-signal combining in fiber amplifiers, and wavelength-multiplexed optical networks.

With their precise power splitting, low loss, and robust fiber construction, GoPhotonics’ range of fiber optic couplers ensures efficient light management and stable signal performance across diverse wavelength bands and system configurations. Designed for accuracy, consistency, and seamless integration, they provide reliable optical connectivity for both single-mode and polarization-maintaining systems. Whether for OCT imaging, wavelength multiplexing, sensing, or communication networks, these couplers deliver the precision, durability, and performance essential for high-quality photonic applications.