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Fiber Optics Feedthroughs

These feedthroughs provide the interface between fiber optics and UHV technology in UV and IR ranges. Both Singlemode and Multimode fibers are available as standard in varying terminations (SMA, FC/APC, etc.).

UHV compatible materials used for all feedthroughs, vacuum-side cable assemblies, and vacuum-side couplers
The fiber is cladded with doped silica and coated with a proprietary Cu Alloy
Fiberoptic feedthrough operating temperature -25°C to 75°C

Standard Single Mode Fibers

Optical Fiber feedthroughs with integrated singlemode fibers are made for a finite specified wavelength.

When singlemode fibers are used to transmit laser power the use of FC/APC connections is recommended. With FC/APC connectors reflections at the coupling interfaces are refracted into the fiber cladding, optimizing the signal to noise ratio. Our optical fiber feedthroughs are Ultra High Vacuum compatible and offer low insertion loss, resulting in very high transmission.

Wavelength for Transmission	633 nm	780 nm	850 nm	1310 / 1550 nm
Core Diameter	3.7 μm / 4.4 μm	4.6 μm / 5.5 μm	4.9 μm / 5.9 μm	8.0 μm / 9.5 μm
Cladding	125 μm	125 μm	125 μm	125 μm
Numerical Aperture	0.12	0.12	0.12	0.12
Cutoff Wavelength	580 nm	720 nm	770 nm	1260 nm
Typical Insertion Loss	<= 0.5 dB	<= 0.5 dB	<= 0.5 dB	<= 0.5 dB
Ferrule	2.5mm ZrO₂ FC/APC	2.5mm ZrO₂ FC/APC	2.5mm ZrO₂ FC/APC	2.5mm ZrO₂ FC/PC, FC/APC
Termination Style	FC/APC	FC/APC	FC/APC	FC/PC & FC/APC

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Standard Multi Mode Fibers

Optical Fiber feedthroughs with integrated multimode fibers are made for a broad wavelength range. Fibers with core diameters of 50 μm, 200 μm, 400 μm and 600 μm are offered. These feedthroughs cover many applications in the ultraviolet range (UV), in the visual range (VIS), and in the near infrared range (NIR). Fibers with a core diameter of 200 μm - 600 μm provide a refractive index with step-index distribution. The MM50 fiber is a graded index fiber which shows minimal mode dispersion due to an optimized refractive index.

Wavelength for Transmission	190-1100 nm	190-1100 nm	190-1100 nm	400-2400 nm	400-2400 nm	400-2400 nm	450-2100 nm	500-2600 nm
Core Diameter	200 μm	400 μm	600 μm	200 μm	400 μm	600 μm	50 μm	400 μm
Cladding	220 μm	440 μm	660 μm	220 μm	440 μm	660 μm	125 μm	440 μm
Numerical Aperture	0.22	0.22	0.22	0.22	0.22	0.22	0.2	0.36
Typical Insertion Loss	<= 1.5 dB at 850 nm	<= 1.2 dB at 850 nm FSMA <= 0.5 dB at 850 nm FC/PC	<= 1.2 dB at 850 nm	<= 1.5 dB at 850 nm	<= 1.2 dB at 850 nm FSMA <= 0.5 dB at 850 nm FC/PC	<= 1.2 dB at 850 nm	<= 0.5 dB at 1300 nm	<= 0.5 dB at 1300 nm
Ferrule	ZrO₂ FSMA	ZrO₂ FSMA, 2.5mm ZrO₂ FC/PC	ZrO₂ FSMA	ZrO₂ FSMA	ZrO₂ FSMA, 2.5mm ZrO₂ FC/PC	ZrO₂ FSMA	2.5mm ZrO₂ FC/PC, FC/APC	2.5mm ZrO₂ FC/PC
Termination Style	UV configuration, FSMA	UV configuration, FC/PC, FSMA	UV configuration, FSMA	IR configuration, FSMA	IR configuration, FC/PC, FSMA	IR configuration, FSMA	FC/PC & FC/APC	IR configuration, Germanium doped, FC/PC

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FC/APC Connection

Threaded FC/APC connectors (typically used with Single Mode fibers) are designed for high-vibration environments and minimal back reflections. The "APC" stands for "angled physical contact" these connectors allow the surfaces of two connected fibers to be in direct contact with each other. The fiber is polished at an angle to prevent reflected light from traveling back up the fiber.

FC/PC Connection

Threaded FC/PC connectors (typically used with Single Mode fibers) are designed for high-vibration environments. The "PC" stands for "physical contact" because these connectors allow the surfaces of two connected fibers to be in direct contact with each other.

SMA Connection

SMA connectors, which are most commonly used with multimode fibers, have a ferrule design that is ideally suited for large core fibers.

Start Your Configuration

Please select the options to configure your part number.

1. Mode:
2. Transmitted Wavelength:
3. Core Size by μm:
4. Fiber Termination Type (Air Side : Vac Side):
5. Flange:
6. Number of Fiberoptic Passes per Flange: