Digital Tunable Bandpass Filter, 1527 - 1567 nm
Overview
The TOF1550 is a digital tunable Gaussian bandpass filter engineered for telecommunication C-band applications, specifically spanning the 1527 - 1567 nm wavelength range. It is designed to support 50 GHz Dense Wavelength Division Multiplexing (DWDM) ITU grid channel spacing, allowing users to isolate specific channels from a broadband input signal.
This device features a user-friendly touchscreen interface for precise control of the target center wavelength. It provides flexible operational modes, including direct wavelength selection or ITU grid channel selection (channels 14 to 63), with adjustable step sizes for granular tuning. The filter is housed in a compact aluminum enclosure suitable for laboratory or production environments and includes silicone rubber bezels for enhanced grip and surface protection.
For system integration, the TOF1550 supports remote operation via a USB Type-C port. When connected, the filter is recognized as a serial (COM) port, enabling automated control through standard serial communication protocols. This makes it an effective tool for signal selection, monitoring, and diagnostic applications in optical communication systems.
Key Features
-
Tunable Gaussian Passband
Features a Gaussian filter profile specifically optimized for C-band (1527 - 1567 nm) telecommunication signals. -
ITU Grid Compatibility
Supports 50 GHz DWDM ITU grid channel selection (channels 14–63), facilitating precise channel isolation. -
Remote Interface
Equipped with a USB Type-C port for remote operation and automation via serial (COM) port commands. -
Low Insertion Loss
Provides a low insertion loss of <3.5 dB (2.5 dB typical) at 1550 nm, maintaining high signal integrity. -
High Isolation
Delivers non-adjacent isolation of ≥27 dB, effectively suppressing unwanted spectral noise. -
Touchscreen Control
Integrated touchscreen interface allows for intuitive, on-device tuning of center wavelength and step size.
Applications
- Dense Wavelength Division Multiplexing (DWDM)
- Spectral Response Characterization
- Out-of-Band ASE Suppression
- Receiver Testing
Technical Specifications
| Specification | Value |
|---|---|
| Manufacturer | Thorlabs |
| Model | TOF1550 |
| Wavelength Tuning Range | 1527 - 1567 nm |
| Passband Width @ -1 dB | ≥0.12 nm (15.0 GHz) |
| Passband Width @ -3 dB | ≥0.21 nm (26.2 GHz) |
| Passband Width @ -20 dB | ≥0.77 nm (96.1 GHz) |
| Insertion Loss | <3.5 dB (2.5 dB typical) |
| Polarization Dependent Loss | <0.3 dB |
| Non-Adjacent Isolation | ≥27 dB |
| Maximum Input Power | 300 mW (24.78 dBm) |
| Connector Type | FC/APC Narrow Key (2.0 mm) |
| Communication Port | USB Type-C |
Frequently Asked Questions
Can the TOF1550 be operated remotely?
Yes, the device features a USB Type-C port that allows for remote operation via a computer using serial (COM) port commands.
What type of fiber connectors are used?
The device utilizes FC/APC narrow key (2.0 mm) fiber connectors for input and output.
How can the device be mounted?
The filter uses Thorlabs' EEET6011 compact aluminum housing, which is compatible with mounting clamps such as the ECM125 and ECM325.
What is the maximum input power for the TOF1550?
The maximum input power is 300 mW (24.78 dBm).
Is the filter suitable for DWDM applications?
Yes, the TOF1550 is specifically designed for 50 GHz DWDM ITU grid channel spacing applications.