The series of field optical patch cords OPTOKON HMA-JF is a high-performance model line with a 1.25 mm ferrule for extreme conditions, combining significantly reduced optical loss and a rugged design for use in heavy field/military networks.
The HMA-JF design is optimized for long-distance communication lines where signal quality and minimal loss are critical, while maintaining the advantages of hermaphroditic coupling (no need for adapters or separate “plug-socket” systems).
Comparative characteristics of the models
Below is a table with the key characteristics of HMA-JF and a comparison with other HMA series for better understanding.
Series | Fiber type | Number of channels | Connector / insert type | Typical loss | Operating temperature | Application type |
HMA-JF | Singlemode and multimode (1.25 mm ferrule) | up to 4 channels | 1.25 mm ferrule, hermaphroditic connection | MM: ≈0.3 dB typ. (@850/1300 nm); SM: ≈0.5 dB typ. (@1310/1550 nm) | ~ -40 °C to +70 °C | Long optical routes, military networks |
HMA-J | Singlemode / multimode | up to 4 channels | Expanded Beam, hermaphroditic connection | SM: 0.8–1.8 dB typ. (@1310/1550 nm) | -45 °C to +85 °C | Tactical / industrial applications |
HMA-M / HMA-S | From 1 to 8 channels, hybrid models | — | Expanded Beam, hermaphroditic connection | — | — | Universal field solutions |
HMA-JF Features
- Uses the standard 1.25 mm ferrule — provides high density and excellent optical transmission.
- Adapter-free design: the hermaphroditic body allows quick cable-to-cable daisy-chain connection without adapters.
- Removable sleeves for easy cleaning and fiber-end inspection — improving convenience in the field.
- High sealing — IP68 protection rating, allowing use in wet, dirty, or harsh environments.
Features and benefits
- Minimized optical loss: HMA-JF is designed specifically for cases where long-distance transmission with minimal loss is essential.
- Field reliability: suitable for harsh environments — water, dirt, dust, and vibration are not critical.
- Ease of maintenance: removable inserts for cleaning fiber ends simplify on-site service.
- Hermaphroditic coupling: simplifies installation, eliminates the need for plug-socket systems and adapters.
- Compatibility with various cable configurations: although the number of channels is relatively small (up to 4 for HMA-JF), it is optimized for high-performance routes.
FAQ (Questions / Answers)
Q1: What is the advantage of the HMA-JF series over HMA-J?
A1: The HMA-JF series uses a 1.25 mm ferrule, enabling lower optical loss and higher fiber density, and is more suited for long-distance routes, while HMA-J is a slightly “broader” Expanded Beam option.
Q2: How many fibers does HMA-JF support?
A2: Up to 4 optical channels.
Q3: What are the operating conditions of HMA-JF?
A3: Temperature range from -40 °C to +70 °C. Protection rating — IP68.
Q4: What does hermaphroditic connection mean?
A4: It means both ends of the connector have the same configuration, so no “male-female” connectors or adapters are needed — quick and simple connection.
Q5: Can this patch cord be serviced in the field?
A5: Yes — the HMA-JF series is designed for field service: removable sleeves for cleaning, rugged housing, suitable for military / heavy-duty conditions.
Q6: For which applications is HMA-JF recommended?
A6: Long optical routes, military networks, field communication nodes where minimal loss and high connection reliability are important.
