Temperature-Controlled Wavelength-Tunable FBG Filter Module
Fiber Bragg Grating (FBG) Filter Module | Product Manual
Document No. | FX-FBGFLT-202501 |
Document Date | 2025-01 |
Standard Model | FX-FBG-ITU34 |
Product Overview:
The temperature-controlled tunable FBG filter module uses thermal tuning to adjust the center wavelength of a fiber Bragg grating, enabling stable narrowband filtering and precise wavelength selection. It can improve spectral quality, suppress ASE noise, and enhance signal purity in sensing or communication systems.
Key Features:
• Temperature control enables adjustable center wavelength for precision wavelength selection and system tuning.
• Narrowband filtering can be used for ASE noise suppression, EDFA ASE filtering, and spectral cleanup.
• Compact structure for integration into laser stabilization, fiber sensing, and optical communication test platforms.
Applications:
• Fiber sensing demodulation, wavelength selection, and narrowband optical filtering.
• EDFA ASE filtering, ASE noise suppression, and spectral cleanup.
• Laser stabilization, optical communication testing, and research experiment systems.
· Confirm the center wavelength: default 1550.12 nm (ITU-C34). Other C-band wavelengths and 1310 nm can be customized.
· Confirm the TEC temperature-control setting range and ambient temperature conditions.
· Confirm the fiber interface: standard SMF-28e pigtail and FC/APC connector.
· Confirm power supply and communication: 5 VDC single power supply and RS232 communication.
Center Wavelength | Default 1550.12 nm (ITU-C34). Other C-band wavelengths and 1310 nm can be customized. |
Wavelength Tuning Range | 300 pm (typical), achieved by changing the TEC temperature |
FBG Bandwidth | 100 pm (3 dB bandwidth, typical) |
Side-Mode Suppression Ratio | ≥ 15 dB |
Insertion Loss | 1.5 dB typical, 2 dB maximum, including circulator |
Power Supply | 5 VDC ± 0.25 V single power supply |
Fiber and Interface | SMF-28e single-mode fiber, 0.5 m; FC/APC. COM port is the input; FBG reflection port is the output. |
Main Body Size | 90 × 70 × 15 mm; 4-φ3.5 through holes for mounting |
Note: The parameters in this manual are standard values or typical values. Special wavelengths, pigtail lengths, interface types, wide-temperature versions, and test conditions are subject to the order specification.
CIR = circulator; AR = anti-reflection.
Figure 1. Optical path schematic.
Symbol | Parameter | Condition | Min | Typ | Max | Unit |
Pin | Input Power | CW | — | — | 500 | mW |
λc¹ | Center Wavelength | Default ITU-C34; other wavelengths customizable | — | 1550.12 | — | nm |
Δλ | Wavelength Tuning Range | By changing TEC temperature | — | 300 | — | pm |
Tset² | Temperature Setting Range | TEC set temperature | 20 | — | 50 | °C |
SMSR | Side-Mode Suppression Ratio | — | 15 | — | — | dB |
δλ | FBG Bandwidth | 3 dB bandwidth | — | 100 | — | pm |
IL | Insertion Loss | Including circulator | — | 1.5 | 2 | dB |
Vcc | Supply Voltage | VDC | 4.75 | 5 | 5.25 | V |
¹ Other C-band wavelengths and 1310 nm wavelengths can be customized.
² If the set operating temperature is lower than ambient temperature, a temperature difference of no more than 20 °C is recommended and good heat dissipation is required.
Item | Specification / Description | Unit | Remarks |
Operating Temperature | 0 to 50 | °C | -35 to 70 °C wide-temperature version customizable |
Operating Humidity | 5 to 90 | %RH | Non-condensing |
Storage Temperature | -40 to 70 | °C | Non-condensing |
Storage Humidity | 5 to 90 | %RH | Non-condensing |
Item | Specification / Description |
Pigtail Type | SMF-28e single-mode fiber |
Fiber Connector | FC/APC; COM port input; FBG reflection port output |
Power Supply Interface | 5 VDC ± 0.25 V |
Communication Protocol | RS232 |
Figure 2. Product appearance and wiring view.
Figure 3. Mechanical dimensions (unit: mm).
FX-FBG-[WL]-[TEMP]-[IF]-[OPT]
Field | Code / Option | Description | Default |
WL | ITU34 / Cxx / 1310 / CUS | Center wavelength. ITU34 corresponds to 1550.12 nm. | ITU34 |
TEMP | STD / WIDE | Standard-temperature or wide-temperature version. | STD |
IF | APC / PIGTAIL / CUS | FC/APC or customized pigtail interface type. | APC |
OPT | CUS | Customized options, such as adding an FBG transmission output. | Blank |
Confirmation Item | Recommended Description |
Center Wavelength | Confirm target center wavelength, allowable deviation, ITU channel, or 1310 nm customization requirement. |
Temperature and Tuning | Confirm target set temperature, ambient temperature range, and required wavelength tuning range. |
Optical Path and Interface | Confirm the COM input, FBG reflection output, connector type, and pigtail length. |
Electrical and Communication | Confirm 5 VDC supply capability, RS232 communication connection, and cable definition. |
Application Conditions | Confirm ASE/laser source optical power, CW operating conditions, installation space, and heat dissipation conditions. |
· FX-FBG-ITU34-STD-APC: 1550.12 nm (ITU-C34), standard-temperature version, FC/APC interface.
· FX-FBG-CUS-WIDE-APC: customized C-band wavelength, wide-temperature version, FC/APC interface.
· FX-FBG-1310-STD-PIGTAIL-CUS: 1310 nm band, standard-temperature version, customized pigtail and interface.
Note: Unless otherwise specified, center wavelength, bandwidth, insertion loss, tuning range, temperature-control range, and interface configuration in this manual are typical values or standard configurations. Customized wavelengths, wide-temperature versions, connectors, and test conditions may affect final specifications.
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