1550.12nm DWDM DFB Laser

Product Overview-1550.12nm DWDM DFB Laser

The 1550.12nm DWDM DFB Laser (Model BFLD-CH34-XXSM-FA, ITU Grid Channel 34) is a 14-pin butterfly packaged distributed feedback laser diode specifically designed for analog CATV transmission and DWDM optical communication applications. Operating at the standard ITU grid wavelength of 1550.12nm, this device delivers 10mW or 20mW optical output power through single-mode or polarization-maintaining fiber with FC/APC connector.

Housed in a hermetic 14-pin butterfly package with integrated isolator, thermoelectric cooler (TEC), 10kΩ thermistor, and monitor photodiode, the laser provides temperature and power stabilization across the full -40°C to +85°C operating temperature range. Two pinout configurations (Type 1 and Type 2) are available for compatibility with different system board designs.

Key Features-1550.12nm DWDM DFB Laser

· Standard ITU grid wavelength: 1550.12nm (Channel 34), full CH18–CH64 rangeoptional

· High optical output power:10mW or 20mW

· Advanced analog chip design optimized for CATV transmission

· High side-mode suppression ratio: SMSR ≥30dB

· Built-in optical isolator: ≥30dB isolation @25°C

· High optical return loss: ≥40dB

· Wide modulation bandwidth: 2.5GHz typical

· 14-pin hermetic butterfly package with integrated TEC and thermistor

· Integrated monitor photodiode for power monitoring

· Fiber options: SMF-28e single-mode or PMF-1550 polarization-maintaining fiber

· Standard FC/APC connector, 1.0m pigtail (900μm loose tube)

· Wide operating temperature range: -40°C to +85°C

· Two pinout configurations (Type 1 / Type 2) for design flexibility

Typical Applications-1550.12nm DWDM DFB Laser

· CATV broadcast networks and headend transmission systems

· Networks with limited fiber resources (wavelength multiplexing)

· Cable television hub and distribution equipment

· Optical transmitter modules for analog RF-over-fiber

· Fiber optic test and measurement instrumentation

· Satellite and RF signal distribution over fiber

· Research and development in optical communication laboratories

· OEM integration into CATV and telecom equipment

Product Specifications-1550.12nm DWDM DFB Laser

Absolute Maximum Ratings

Electro-Optical Characteristics (T = 25°C, IF = IOP)

ITU Grid Wavelength Reference (Selected Channels)

Note: Full ITU grid channels CH18–CH64 (1526.44nm–1563.05nm) available upon request.

Optical Fiber Specifications-1550.12nm DWDM DFB Laser

Package and Pin Definition-1550.12nm DWDM DFB Laser

Ordering Information-1550.12nm DWDM DFB Laser

Model Nomenclature

BFLD - XXXX - XX - XX - XX (-X)

Example: BFLD-CH34-10SM-FA

Why Choose Box Optronics DWDM DFB Lasers?

· Proven DFB laser chip technology with analog-optimized design for CATV applications

· 100% functional testing and burn-in screening before shipment

· Full ITU grid wavelength support (CH18–CH64) with tight wavelength tolerance

· Competitive pricing with factory-direct supply

· Flexible order quantities — support for both R&D prototypes and volume production

· Customization options for wavelength, power, fiber type, connector, and pin configuration

· Long-term supply stability for CATV network deployment and production programs

· Hermetic butterfly packaging with integrated TEC for reliable wide-temperature operation

· International shipping via DHL/UPS/FedEx with full tracking

Frequently Asked Questions (FAQ)

Q: What is the difference between this DWDM DFB laser and a standard DFB laser?

A: This ITU-grid DFB laser combines precise wavelength control with analog CATV-optimized performance. It features an optimized laser chip design for high carrier-to-noise ratio (CNR), low distortion performance (CSO/CTB), and stable optical output.

Compared with standard DFB lasers mainly designed for digital optical communication, CATV DFB lasers are specifically optimized for analog modulation applications where linearity and noise performance are critical.

Q: What ITU grid wavelengths are available?

A: We offer ITU-T grid wavelengths from CH18 (1563.05nm) to CH64 (1526.44nm), covering commonly used C-band DWDM channels. Custom wavelengths are available according to specific system requirements.

Q: What is the difference between SMF and PMF fiber options?

A: SMF-28e is standard single-mode fiber, suitable for most CATV and general optical communication applications where polarization is not critical. PMF-1550 is polarization-maintaining fiber, designed for polarization-sensitive systems. For PM fiber, the slow axis is aligned to the connector key. Select based on your system polarization requirements.

Q: Why is a built-in isolator important for CATV applications?

A: Optical feedback caused by fiber reflections or optical components may introduce noise, wavelength instability, and signal degradation in analog transmission systems. The built-in optical isolator suppresses optical feedback, ensuring stable output power, low noise, and reliable CATV transmission performance.

Q: What is the minimum order quantity (MOQ)?

A:The MOQ is 1pc.We support flexible order quantities. Standard models can be supplied in small quantities for R&D and prototyping, as well as larger volumes for CATV network deployment and production. Contact our sales team for specific pricing at your required quantity.

Q: Can I get a custom wavelength, power, or connector configuration?

A: Yes, we offer comprehensive customization options including any ITU grid wavelength (CH18–CH64), custom output power levels within 6–20mW, alternative fiber types and lengths, different connector types (FC/APC, SC/APC, LC, etc.), and tailored pin configurations (Type 1 or Type 2). Contact us with your specific requirements and our engineering team will review feasibility and provide a quotation.

Datasheet and Testsheet

Datasheet

Testsheet

Lead Time

· Standard units (in-stock models): 3~5 working days

· Standard production: 2~3 weeks

· Volume orders: Please contact us for a production schedule

· Custom orders: 3~4 weeks

· International shipping: ~5 working days (DHL/UPS/FedEx Express)

Operation Notes and Handling

· Laser diodes are electrostatic discharge (ESD) sensitive devices — always use proper ESD protection when handling

· Avoid touching the fiber end-face and optical components with bare fingers to prevent contamination

· Store unused devices in ESD-safe packaging at recommended storage temperature (-40°C to +85°C)

· Do not exceed the absolute maximum ratings specified in the datasheet

· Always use a laser diode driver with current limiting and over-voltage protection

· Enable TEC temperature stabilization before applying laser drive current for optimal performance and reliability

· Avoid excessive bending of the fiber pigtail  to prevent fiber damage

· Clean fiber connectors with proper cleaning tools before mating to prevent damage and insertion loss

· Operating the laser above rated current or outside temperature range may reduce lifetime and cause permanent damage