1310-1550nm Singlemode Standard Coupler (GK-SMC Series)
description1
Specifications
Parameter |
Unit |
Value |
Center Wavelength (λc) |
nm |
1310, 1550, or specified |
Operating Wavelength |
nm |
λc ± 20 |
Coupling Ratio |
% |
01/99 02/98 03/97 10/90 15/85 20/80 |
Max. Insertion Loss |
dB |
21.4/0.2 18.5/0.25 17.4/0.3 14.5/0.4 10.8/0.65 8.8/0.95 7.5/1.2 |
Coupling Ratio |
% |
25/75 30/70 40/60 45/55 50/50 |
Max. Insertion Loss |
dB |
6.5/1.55 5.6/1.8 5/2.25 3.85/2.98 3.4 |
Max. PDL (Tap/Through Port) |
dB |
0.10 |
Max. Excess Loss |
dB |
0.10 |
Thermal Stability |
dB/℃ |
≤ 0.002 over -5 to +70 |
Min. Return Loss |
dB |
50 |
Directivity 1 × 2 2 × 2 |
dB |
55 60 |
Max. Optical Power (CW) |
mW |
300 |
Fiber Type |
- |
SMF-28 Fiber |
Operating Temperature |
℃ |
-5 to +70 |
Storage Temperature |
℃ |
-40 to +85 |
¹IL is 0.3 dB higher, RL is 5 dB lower for each connector added. |
Package Dimensions

product description
The Singlemode Standard Coupler (GK-SMC Series) from GKER Photonics is engineered to deliver exceptional performance in optical communication systems. This coupler features very low insertion loss and minimal polarization dependence, ensuring high-efficiency signal management. Designed for a broad wavelength range, including the widely used 1310 nm and 1550 nm windows, it provides accurate coupling ratios from 50/50 to 1/99 with excellent uniformity.
Built to withstand a range of environmental conditions, the GK-SMC Series maintains stability and reliability across temperatures from -5°C to +70°C. Its low excess loss and high return loss contribute to consistent performance, making it ideal for precise power splitting and monitoring applications in various optical systems. The coupler is well-suited for network testing, signal monitoring, and fiber laser applications, where dependable and accurate signal handling is crucial.
With options for different coupling ratios, connector types, and fiber jackets, this coupler is adaptable to a variety of configurations, ensuring it meets the specific needs of your optical communication infrastructure.