Variable Ratio Coupler
A fiber variable ratio coupler, also known as tunable directional coupler (FTDC) has an all-fiber construction and provides the tuning range of 0 – 100 % coupling ratio with negligible optical loss. It is based on evanescent field coupling using two side polished fibers where the coupling ratio is tuned by adjusting the core-to-core geometric offset. Customer specified fibers and operating wavelengths are available including single-mode fibers, polarization maintaining fibers and other specialty fibers.
Features
- Negligible loss
- Polished fiber coupler
- Tunable coupling ratio (0-100%)
- Available with various fiber types including SMF and PMF
- Available at customer specified wavelength
- Very small size
Applications
- Optical system testing
- Interferometry
- General laboratory experiments
- Optics education kits
Specifications
Insertion loss(dB) : <0.1 (bare type), <0.5(adapter type)
Tuning range of coupling (%) : 0-100
Operation wavelength (nm) : 633, 830, 980, 1064, 1550
Polarization Extinction Ratio(dB) : >20 (PM only)
Demo Video
Related Documents