Narrow-Linewidth High Power DFB Laser
Product Manual V2.0
FXDFB-100K is built around the 100 kHz linewidth class and features single-longitudinal-mode output, low sensitivity to environmental vibration, and mode-hop-free behavior. |
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Product Overview:
The 100kHz narrow-linewidth high-power DFB laser combines narrow linewidth, high output power, and low phase noise, making it suitable as a core light source for distributed fiber sensing and coherent measurement systems. It operates in the 1550nm/1.5um communication band and can provide 100mW (+20dBm) class optical output.
Key Features:
• 100kHz-class narrow linewidth helps improve coherent detection and Brillouin sensing performance.
• 100mW (+20dBm) high output power supports long-distance links and high-power-budget applications.
• Low phase noise and stable operation support engineering integration and long-term use.
Applications:
• BOTDA/BOTDR distributed temperature and strain fiber sensing light source.
• DVS distributed vibration fiber sensing, coherent detection, and beat-note measurement.
• Coherent wind LiDAR, precision optical measurement, and laboratory narrow-linewidth light sources.
Positioning and Applications
The 100 kHz linewidth class, power stability, and polarization-maintaining output jointly determine system performance. This DFB source is suitable for narrow-linewidth applications that require convenient integration, vibration robustness, and cost efficiency. |
Core Selection Perspective
Fiber sensing and OEM Stable narrow-linewidth source for fiber sensing hosts, instrument modules, and experimental systems. | Vibration robust Low sensitivity to environmental vibration, suitable for long-term field or in-equipment operation. | C-band compatible Supports ITU DWDM or customized wavelengths for easy matching with existing fiber systems and devices. |
Key Features
Single longitudinal mode Single-longitudinal-mode output for coherent and interferometric measurements. | Narrow linewidth Available in the < 100 kHz linewidth class. | Vibration insensitive Low sensitivity to environmental vibration for engineering integration. |
C-band configuration Supports ITU DWDM or customized center wavelengths. | Mode-hop-free Supports long-duration operation and consistent data results. | PM fiber pigtail Aligned to slow axis; FC/APC connector typical. |
Note: This product has been verified against reliability requirements related to Telcordia GR-468. Specific applicability depends on the supplied version and project specification.
Electro-Optical Specifications
The parameter tables are intended for standard selection. Output power, center wavelength, connector, and temperature grade shall be subject to the final order specification and factory test report. |
Multi-Model Configuration Parameters (for preliminary selection)
Item | FXDFB-100K-1 | FXDFB-100K-2 | FXDFB-100K-3 | Remarks |
Output power grade | Level 1 | Level 2 | Level 3 | Order by power level |
Typical output power | 20 mW | 50 mW | 100 mW | Power grade shall follow the order specification |
Linewidth class | 100 kHz |
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Center wavelength | C-band ITU DWDM or customized wavelength; typical 1550.12 nm, ±0.5 nm | Subject to specification and factory report | ||
Output interface | PM fiber pigtail, aligned to slow axis; FC/APC typical | Connector can be customized | ||
Operating temperature | 0~50°C standard; -40~75°C optional | Wide-temperature version requires order confirmation | ||
Electro-Optical Specification Table
Symbol | Parameter | Condition | Min. | Typ. | Max. | Unit |
Pout | Typical output power | Level 1 | — | 20 | — | mW |
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| Level 2 | — | 50 | — | mW |
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| Level 3 | — | 100 | — | mW |
ΔP | Output power stability | 0~60°C | — | ±20 | — | % |
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| Temperature control ≤±1°C | — | ±0.5 | — | % |
λc | Center wavelength | C-band ITU | — | 1550.12 | ±0.5 | nm |
SMSR | Side-mode suppression ratio | — | 40 | — | — | dB |
Δλ | Linewidth | — | — | 100 | — | kHz |
PER | Polarization extinction ratio | Aligned to slow axis | 18 | — | — | dB |
ISO | Optical isolation | — | 20 | — | — | dB |
Vcc | Supply voltage | — | 4.75 | 5 | 5.25 | V |
Note: The linewidth class is 100 kHz. C-band ITU or custom wavelength is confirmed by order. Operating environment, heat dissipation, and connector configuration may affect system-level performance.
Operation, Storage and Delivery Interface
Operating and Storage Conditions
Parameter | Value | Unit |
Operating temperature | 0~50 (standard) / -40~75 (optional) | °C |
Operating humidity | 5~85 (non-condensing) | %RH |
Storage temperature | -40~85 | °C |
Storage humidity | 5~90 (non-condensing) | %RH |
Fiber Connector
Item | Typical configuration | Optional configuration |
Output fiber | PM fiber pigtail, aligned to slow axis | Customized by project |
Connector | FC/APC | Customizable |
Mechanical Design
The mechanical outline is shown below. Dimensions, mounting hole positions, and pigtail direction shall follow the actual order version and drawing.
Figure: Mechanical outline drawing. Units and details are subject to the factory drawing.
Part Number and Ordering Examples
This standard model rule highlights the 100 kHz linewidth class, power level, and wavelength. Additional requirements such as connector, pigtail length, and temperature range can be confirmed in the order notes. |
FXDFB-100K - [Power Level] - [Wavelength] - [Opt]
Field | Code | Description |
Power Level | 1 / 2 / 3 | 1 = 20 mW; 2 = 50 mW; 3 = 100 mW. |
Wavelength | 1550.12 / ITU# / CUS | Enter a center wavelength value, ITU channel, or custom wavelength. |
Opt | WD / FCAPC / CUS | Specify wide-temperature, connector, pigtail length, and other options in the order remarks. |
Ordering Examples
• FXDFB-100K-1-1550.12: 100 kHz linewidth class, Level 1 (20 mW), center wavelength 1550.12 nm.
• FXDFB-100K-2-C34: 100 kHz linewidth class, Level 2 (50 mW), ITU-C34 wavelength configuration (example).
• FXDFB-100K-3-CUS: 100 kHz linewidth class, Level 3 (100 mW), customized center wavelength configuration (example).
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