GDM Series — Optical Fiber Circular Connector

Technical Specifications

Type

Optical fiber circular connector

Fiber Types

Single-mode (SM), Multi-mode (MM)

Channels

1, 2, 4, 8, 12 channels

Insertion Loss

≤ 0.5 dB typical (SM), ≤ 0.3 dB (MM)

Return Loss

≥ 50 dB (SM APC)

Shell Material

Aluminum alloy / Stainless steel

Temperature Range

-55°C to +85°C

Sealing

IP67 environmental

Configuration Options

Channel Count	Fiber Type	Connector Style	Insertion Loss	Applications
1–2 ch	SM / MM	Plug, Wall, Jam Nut	≤ 0.5 dB	Point-to-point data links
4 ch	SM / MM	Plug, Wall, Jam Nut	≤ 0.5 dB	Radar photonic links
8 ch	SM / MM	Plug, Wall, Jam Nut	≤ 0.6 dB	Communication trunk lines
12 ch	SM / MM	Plug, Wall	≤ 0.6 dB	Fiber sensing arrays

Key Features

🔬 Precision Alignment

Ceramic ferrule with precision alignment sleeve ensures low insertion loss and high return loss. Consistent optical performance across mating cycles.

🛡️ Ruggedized Design

Military-grade circular connector housing protects delicate fiber terminations. Shock, vibration, and environmental resistant per MIL-STD-810.

📡 EMI Immune

Fiber optic transmission is inherently immune to electromagnetic interference. Ideal for high-EMI environments like radar and EW systems.

🔄 Hybrid Capable

Optional hybrid configurations combine optical channels with electrical contacts in a single connector shell. Power + data + fiber in one interconnect.

Cross-Reference

GDM Type	Similar Standards	Applications	Notes
GDM 2-ch SM	MIL-PRF-29504 terminus compatible	Avionics data links	Standard LC/SC adapters available
GDM 4-ch MM	ARINC 801 compatible	In-flight entertainment, sensors	Commercial aviation grade
GDM 8–12 ch	Custom optical interconnect	Phased array radar, sensing	Contact factory for configuration