Description

Bulkhead Receptacles, Sleevethru Adapters, and Universal Sleevethru Adapters

OZ Optics bulkhead receptacles, sleevethru adapters, and universal sleevethru adapters provide a precise, low‑loss way to connect optical fibers in demanding laboratory, telecom, and industrial environments. Designed around industry‑standard connector formats, these components are built to ensure accurate fiber alignment, low insertion loss, and repeatable performance for both flat and angled polished terminations. By combining precision zirconia alignment sleeves with robust mechanical housings, they deliver the stability and reliability needed for long‑term operation in fiber optic systems.

Bulkhead receptacles are engineered to mount directly to panels, enclosures, or optical benches, allowing fiber patchcords to interface reliably with other subsystems. With integrated zirconia sleeves that center the ferrule and internal stops that position the fiber tip at a well‑defined point in space, these receptacles are ideal for coupling light into free space optics, detectors, and measurement equipment. Variants without internal stoppers are available for use with OZ Optics pigtailed adjustable FC or SMA connectors, giving users additional flexibility in fine‑tuning the axial position of the fiber endface for specialized coupling requirements.

For applications requiring a direct in‑line connection between two patchcords, sleevethru adapters provide an efficient, compact solution. These adapters are designed to mate two male connectors while maintaining precise ferrule alignment, ensuring minimal insertion loss and back reflection. Flanged versions can be easily mounted to bulkheads or housings for secure, panel‑mount interconnects, while non‑flanged (SP) versions are suited to free‑hanging or embedded connections in confined spaces. The use of high‑quality zirconia split sleeves supports repeated mating cycles while preserving optical performance.

OZ Optics also offers specialized angled bulkhead receptacles to properly accommodate angle‑polished fiber connectors (such as FC/APC) and correct for refraction effects at the angled interface. This attention to connector geometry helps maintain beam pointing accuracy and return‑loss performance, which is essential in high‑precision measurement setups, interferometric systems, and low‑noise communication links. By matching the receptacle to the connector polish style, systems integrators can reduce alignment errors and optimize throughput across a wide range of wavelengths commonly used in fiber optic communications and test systems.

The product line supports all major connector standards, including FC/PC, FC/APC, SMA, SC/PC, LC/PC, and ST/PC, enabling seamless integration into existing networks and laboratory setups. Universal sleevethru adapters further expand this compatibility by allowing dissimilar connector types to be mated together, provided they share the same polish style. This makes it straightforward to transition between different connector interfaces in mixed‑technology systems, adapt legacy equipment to newer patchcords, or consolidate inventory without sacrificing signal integrity or mechanical robustness.

Typical applications for these bulkhead receptacles and adapters include fiber patch panels, distribution frames, and network termination points where reliable patchcord mating is required. In optical laboratories and test environments, they are frequently used to connect instruments, lasers, and detectors via standardized front‑panel interfaces, or to launch beams into free space for alignment with lenses and other photonic components. Industrial and OEM users integrate these components into enclosures and chassis to create rugged, repeatable fiber entry and exit points that withstand handling, vibration, and frequent reconnections.

Whether the requirement is a simple sleeve‑through adapter for in‑line patchcord mating or a panel‑mount bulkhead for free‑space coupling, OZ Optics provides a comprehensive family of solutions optimized for performance and longevity. By combining precision alignment technology, compatibility with the most widely used connector formats, and multiple mounting geometries, these bulkhead receptacles, sleevethru adapters, and universal sleevethru adapters deliver dependable fiber interconnections for communications, sensing, research, and production environments.

Bulkhead Receptacles Sleevethru Adapters and Universal Sleevethru Adapters

Specifications

Connector Type (Side A / Side B): FC/PC - FC/PC, FC/APC - FC/APC, FC/PC - SC/PC, FC/APC - SC/APC, SC/PC - SC/PC, LC/PC - LC/PC, LC/APC - LC/APC, SMA - SMA, ST - ST
Fiber Type Compatibility: Single-mode, Multimode, Polarization-maintaining
Adapter Gender: Male-Male, Female-Female, Male-Female
Ferrule Diameter: 1.25 mm
Product Type: Bulkhead receptacles, sleevethru adapters, universal sleevethru adapters
Supported Connector Types: FC/PC, FC/APC, SMA, SC/PC, LC/PC, ST/PC
Alignment Sleeve Material: Precision zirconia
Keyway Width (Type N): 2.15–2.20 mm for 2.14 mm wide key connectors
Keyway Width (Type R): 2.03–2.07 mm for 2.00 mm wide key connectors
Connector Style SMPC-03: Flanged sleeve-thru connector for singlemode or polarization maintaining FC/PC connectors
Connector Style SMPC-03-SP: FC/PC sleeve-thru adapter, 2.14 mm keyway, no flange
Connector Style PMPC-03: Flanged sleeve-thru connector for polarization maintaining FC/PC connectors
Connector Style PMPC-03-: Nickel plated brass body with zirconia split sleeve, special D-mount panel side with three flats
Connector Style PMPC-03-: PM FC-FC D-mount sleeve-thru adapter with 2.00 mm OD keyway

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Features

  • High-Precision Fiber Alignment – Features precision zirconia split sleeves for accurate centering of ferrules, ensuring low-loss, repeatable connections comparable to high-end bulkhead adapters used in telecom and test & measurement systems.
  • Compatible with Multiple Connector Types – Supports industry-standard FC/PC, FC/APC, SMA, SC/PC, LC/PC, and ST/PC connectors, enabling flexible integration with existing patch cords and network hardware.
  • Supports Flat, Ultra, Super, and Angled Polishes – Available in versions optimized for flat (PC), ultra, super, and angled (APC) connector endfaces, delivering excellent optical performance for both standard and low-reflection connections.
  • Bulkhead Receptacles for Free-Space Coupling – Bulkhead designs allow you to terminate fiber on a panel or enclosure and project light into free space for use with lenses, detectors, collimators, and other free-space optical assemblies.
  • Optional Fiber Stoppers for Precise Axial Positioning – Select bulkhead receptacles include an internal stopper that defines a repeatable fiber tip position, improving consistency in free-space launch conditions; stopper-free versions are available for adjustable FC or SMA connectors.
  • Angled Receptacles for APC Connectors – Specially engineered angled bulkhead receptacles correct for refraction effects from angle-polished connectors (FC/APC and similar), minimizing back reflection in high-sensitivity or high-power systems.
  • Sleevethru Adapters for In-Line Fiber Mating – Sleeve-thru (in-line) adapters provide precise mating between two male connectors, ideal for patch panel interconnections, test setups, and modular fiber routing.
  • Universal Sleevethru Adapters – Universal adapters allow mating of fibers with dissimilar connector types (e.g., FC to SC, ST to SC), as long as their polish type matches, simplifying hybrid connections without custom patch cords.
  • Flanged and Non-Flanged Mounting Options – Offered in both flanged and SP (no-flange) styles to accommodate direct panel mounting, bracket mounting, or free-floating in-line use, enabling easy integration into instruments and enclosures.
  • Panel and “D” Mount Variants – Includes specialized “D” mount panel interfaces with three flats on the panel side for secure, anti-rotation mounting in standardized cutouts, widely used in instrumentation and rack systems.
  • Support for Singlemode and Polarization Maintaining Fibers – Models such as SMPC and PMPC series are optimized for singlemode and polarization maintaining (PM) fibers, providing stable key alignment essential for polarization-sensitive applications.
  • Precision Keyway Options (Type N and Type R) – Available with 2.14 mm (Type N, “wide key”) and 2.00 mm (Type R) keyway widths, ensuring proper fit and angular alignment with corresponding FC connectors commonly used in high-end PM systems.
  • Low Insertion Loss and High Return Performance – High-quality ferrule alignment and tight mechanical tolerances yield low insertion loss comparable to leading telecom-grade adapters; APC-configured units support low back-reflection requirements.
  • Rugged, Industry-Proven Construction – Manufactured using nickel-plated brass housings and zirconia sleeves for durability, thermal stability, and long service life in laboratory, field, and OEM environments.
  • Versatile Mounting for OEM and Lab Setups – The bulkhead flange and “D” mount options allow straightforward integration into patch panels, optical instruments, laser systems, and detector housings, matching common footprints used across the photonics industry.
  • Ideal for Fiber-to-Fiber or Fiber-to-Free-Space Connections – Designed for both fiber-to-fiber mating via sleevethru adapters and fiber-to-free-space coupling via bulkhead receptacles, covering a broad range of laboratory, telecom, sensing, and industrial uses.
  • Wide Application Range – Suited for telecommunications, fiber optic test and measurement, laser delivery, sensing, R&D laboratories, and OEM photonics modules where reliable and repeatable connector mating is critical.

Applications

  • Fiber optic patch panel interconnections – Use bulkhead receptacles and sleevethru adapters to connect patchcords on the front and rear of rack‑mount or wall‑mount fiber distribution panels, ensuring low‑loss, repeatable terminations for FC, SC, LC, ST, and SMA connectors.
  • Optical test and measurement setups – Provide stable, low‑insertion‑loss interfaces between test instruments (optical power meters, light sources, OTDRs, spectrum analyzers) and device‑under‑test fibers, allowing quick connector changes without disturbing alignment.
  • Laboratory free‑space launch and collection – Use bulkhead receptacles with precision zirconia sleeves and defined fiber stops to project light from a fiber into free space for experiments with lenses, beam expanders, detectors, cameras, or spatial filters, and to recapture light back into fiber.
  • Optical communication systems and network infrastructure – Integrate adapters into telecom/datacom equipment, ODFs, CWDM/DWDM shelves, and line cards for reliable point‑to‑point or cross‑connect links using FC/PC, FC/APC, SC/PC, LC/PC, and ST/PC connectors.
  • Fiber laser and high‑power delivery interfaces – Use SMA, FC, or specialized bulkhead receptacles on laser chassis or optical tables to safely route high‑power laser light into delivery fibers, process heads, or free‑space optics while maintaining robust mechanical support.
  • Optical sensor and instrumentation enclosures – Mount flanged bulkhead receptacles on housings for fiber‑coupled sensors (temperature, strain, pressure, chemical, and biomedical probes), allowing quick connection and replacement of field fiber leads.
  • Free‑space to fiber coupling modules – Implement precise fiber tip positioning for coupling light from LEDs, laser diodes, supercontinuum sources, or microscopes into singlemode or polarization maintaining fibers, using bulkhead receptacles as stable mechanical references.
  • Polarization maintaining system integration – Deploy PM‑optimized FC/PC and FC/APC sleeve‑through adapters (Type R and Type N keyways) in polarization‑sensitive setups such as interferometers, coherent communication links, and quantum optics benches for stable polarization alignment.
  • Angle‑polished connector (APC) links – Use specially designed angled bulkhead receptacles and sleevethru adapters for FC/APC and SC/APC connectors to minimize back‑reflection in CATV, RF‑over‑fiber, FTTH, coherent detection, and high‑dynamic‑range measurement systems.
  • Cross‑connector and hybrid patching – Utilize universal sleevethru adapters to mate dissimilar connector types (e.g., FC‑to‑SC, FC‑to‑ST, LC‑to‑SC) with matching polish styles, simplifying upgrades or mixed‑connector infrastructures in labs and networks.
  • Field deployment and maintenance panels – Install rugged flanged receptacles in portable test kits, field termination boxes, and outdoor enclosures to provide robust, repeatable fiber access points during installation, troubleshooting, and reconfiguration.
  • Instrumentation front‑panel feedthroughs – Create clean, serviceable front‑panel interfaces on OEM instruments such as optical power meters, tunable lasers, OSAs, and fiber‑coupled detectors using panel‑mount or “D”‑mount receptacles.
  • Fiber‑coupled detector and sensor modules – Attach FC, SC, LC, ST, or SMA receptacles to photodiode modules, APDs, PMTs, and IR detectors for stable, low‑loss fiber coupling in spectroscopy, LIDAR, optical power monitoring, and safety interlock systems.
  • Microscopy and imaging systems – Feed illumination into microscopes and imaging setups or collect emitted/fluorescent light via fiber using bulkhead receptacles mounted on microscope ports or imaging modules, enabling modular light routing.
  • Spectroscopy and metrology instruments – Provide reliable, low‑reflection fiber inputs/outputs for Raman, fluorescence, absorption, and OCT systems using FC/PC or FC/APC receptacles, supporting high‑sensitivity and repeatable measurements.
  • Interferometry and coherent optics – Use PM and APC bulkhead adapters to form stable fiber connections in interferometers, coherent detection chains, frequency comb setups, and precision metrology experiments where phase and reflection control are critical.
  • Network demarcation and handoff points – Mount bulkhead adapters in wall plates, MPO breakout boxes, and customer demarcation enclosures to offer standardized FC, SC, LC, or ST handoff interfaces between service providers and end‑user equipment.

Frequently Asked Questions

What are OZ Optics bulkhead receptacles, sleevethru adapters, and universal sleevethru adapters used for?
OZ Optics bulkhead receptacles, sleevethru adapters, and universal sleevethru adapters are precision fiber optic interconnect components used to either join two fiber optic patch cords or to terminate a fiber at a panel and launch light into free space. Bulkhead receptacles mount in a panel or enclosure and allow you to connect a fiber patch cord on one side and either another connector or free‑space optics (lenses, detectors, collimators) on the other. Sleevethru adapters directly mate two male connectors through a zirconia alignment sleeve for low-loss fiber‑to‑fiber coupling. Universal sleevethru adapters are designed to mate fibers terminated with different connector types (for example FC to SC or FC to ST), as long as the ferrule end-face geometry and polish style (PC, UPC, APC) are compatible.
Which fiber optic connector types are compatible with these receptacles and adapters?
The OZ Optics bulkhead receptacles and sleevethru adapters are designed for industry‑standard 2.5 mm and 1.25 mm ferrule connectors. Typical compatible connector styles include FC/PC, FC/APC, SMA, SC/PC, LC/PC, and ST/PC. Sleeve‑thru adapters are available for singlemode and polarization‑maintaining FC/PC connectors, including Type N (2.14 mm wide key) and Type R (2.00 mm key) versions, as indicated by part numbers such as SMPC‑03 and PMPC‑03. Universal sleevethru adapters can mate different connector families to each other (for example FC/SC, ST/SC, ST/FC, or FC/SC with square flange) provided that both sides use the same ferrule size and polishing style (flat PC or angled APC). Always match the adapter type to the exact connector style and key width specified for your patch cords.
What are the advantages of OZ Optics zirconia-sleeve bulkhead receptacles compared to generic fiber adapters?
OZ Optics receptacles and adapters use high‑precision zirconia split sleeves and tightly controlled mechanical tolerances to minimize lateral offset between mated fiber cores, resulting in low insertion loss and stable repeatable connections. The bulkhead receptacles include a mechanical stop that positions the fiber tip at a well‑defined point in space, which is important for free‑space coupling into lenses, detectors, and other optical components. Some versions are available without stoppers for use with OZ pigtailed adjustable FC or SMA connectors, allowing you to fine‑tune the fiber position. OZ also offers specialized angled receptacles that compensate for beam refraction from angle‑polished (APC) connectors, improving return loss and coupling efficiency compared to generic straight adapters when APC terminations are used.
How do I choose between a sleevethru adapter and a bulkhead receptacle for my application?
Choose a sleevethru adapter when you simply need to join two patch cords or pigtails together in-line with minimal mechanical complexity—for example, patch panels, test setups, or extending cable length. These adapters may be supplied with or without flange; flanged versions are easier to mount to a plate or enclosure. Choose a bulkhead receptacle when you must bring a fiber connection through a panel or housing while maintaining a defined optical interface on one side, such as coupling to free‑space optics or an internal subassembly. Bulkhead receptacles with stoppers are ideal when you want a fixed, repeatable fiber tip position relative to the panel, while versions without stoppers suit adjustable or focusable connector assemblies. If you must connect different connector types on each side of a panel, a universal sleevethru adapter may be the best choice.
Can these adapters be used with singlemode, multimode, and polarization-maintaining (PM) fibers?
Yes. OZ Optics sleeve‑thru adapters and bulkhead receptacles are compatible with the fiber type as long as the connector style and ferrule are matched correctly. The SMPC series (e.g., SMPC‑03) is commonly used for singlemode or polarization‑maintaining FC/PC connectors with the standard (Type N) wide keyway. The PMPC series (e.g., PMPC‑03) is specifically optimized for polarization‑maintaining FC/PC connectors and uses a narrower (Type R) keyway to maintain angular alignment of the PM fiber’s slow or fast axis. For multimode applications, use the same mechanical adapter style but ensure your connectors are terminated and polished as multimode (often 50/125 μm or 62.5/125 μm) and that the adapter sleeve size and connector type match. In all cases, the optical performance will depend on the quality of the connector termination and cleanliness of the ferrule end faces.
What is the difference between PC, UPC, and APC connectors, and how does it affect adapter selection?
PC (physical contact) and UPC (ultra physical contact) connectors have flat or slightly curved end faces that mate directly; UPC offers lower typical return loss than standard PC through more precise polishing. APC (angled physical contact) connectors use an end‑face polished at an angle (typically 8°) to direct back‑reflections into the cladding, achieving very high return loss. When choosing OZ Optics adapters, you must match the adapter type to the polish style—use flat or standard sleeve‑thru adapters and receptacles for PC/UPC connectors, and select APC‑specific or angled receptacles and adapters for APC connectors. Using an APC connector in a non‑APC adapter can lead to increased insertion loss, poor return loss, and misaligned beam direction, especially in free‑space coupling configurations.
How are OZ Optics bulkhead receptacles and sleevethru adapters mounted and integrated into enclosures?
Most OZ Optics bulkhead receptacles and sleevethru adapters are supplied with a flange or specialized panel-mount geometry for easy integration into plates and housings. Flanged versions include mounting holes that can be secured with screws or nuts to the front of a panel. Some part numbers, such as PMPC‑03‑"D", feature a special “D”‑shape mount with three flats on the panel side; this prevents rotation, simplifies alignment of keyed connectors (especially important for PM fibers), and provides a robust mechanical interface. Non‑flanged (SP) versions are designed for compact installations where the adapter is held by a plate cutout or additional hardware. To integrate them, you typically machine a matching cutout in your panel, insert the adapter from the desired side, and fasten it using the flange or supplied nut while ensuring that the key orientation is aligned with your system’s polarization or connector keying requirements.

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