1m 1550nm 780nm 75mw Nufern Fiber DWDM DFB Laser Module Laser Diode Butterfly Packaged Laser Module
High Power DFB FP Laser Diode with Machine Packaging
Product Details
DFB HCW-PLD1550Dxx (1550nm-1552nm) Available in A, B, C, E, S-type versions and coaxial TEC package versions.
DFB (Distributed Feedback Laser)
DFB lasers utilize grating filter devices to produce single longitudinal-mode output based on FP lasers. These lasers typically operate at 1310nm and 1550nm wavelengths, available in both refrigerated and non-refrigerated versions, primarily used for high data rate long-distance transmission exceeding 40km at rates above 1.25G.
DFB Laser Performance Parameters
- Working wavelength: Center wavelength of emitted spectrum
- Side mode suppression ratio: Power ratio between main mode and maximum side mode
- 20dB spectral width: Spectral width at 20dB below peak output
- Threshold current: Minimum current required for proper laser operation
- Output power: Optical power emitted from laser output port
| Keywords |
Laser Diode Module With Fiber Collimator 1550 nm |
| Product Name |
Laser Diode With Pigtail |
| Structure Type |
MQW-DFB structure |
| Package Type |
Coaxial package |
| Application |
Laser Welding |
| Type |
Laser Diode |
| Laser Type |
Fiber Laser |
| Isolator |
30dB |
Key Features
- Built-in optical isolator
- Low capacitance and low dark current
- High stability DFB laser die
- Low threshold current and operating current
- Integrated high isolation with low insertion loss
FP (Fabry-Perot) Laser
Primarily used for low data rate short-distance transmission under 20km at rates below 1.25G. Available in 1310nm and 1550nm wavelengths. Some customers opt for FP lasers for cost-effective 1.25G 40km modules, though this requires higher output power that may accelerate laser aging.
FP Laser Performance Parameters
- Working wavelength: Center wavelength of emitted spectrum
- Spectral width: RMS spectral width of multi-longitudinal mode laser
- Threshold current: Minimum current required for proper laser operation
- Output power: Optical power emitted from laser output port
Difference Between FP and DFB Lasers
The primary difference lies in spectral width: DFB lasers feature narrow spectral width as single longitudinal mode devices with distributed negative feedback, while FP lasers have wider spectral width as multi-longitudinal mode devices. They also differ in working wavelength, threshold current, and voltage characteristics.
Frequently Asked Questions
Q1: Are you a trading company or manufacturer?
A: We are a factory verified by TUV.
Q2: What is your delivery time?
A: Samples: 3-5 working days. Formal orders: 7-10 working days.
Q3: Do you provide OEM service?
A: Yes, we can print your logo or label on products or packaging.
Q4: Can you provide free samples?
A: Low-value samples may be free, but shipping costs are your responsibility.
Q5: How do you guarantee quality?
A: All products undergo 100% testing before shipment under our quality management system.
Q6: What are your payment terms?
A: We accept T/T, Western Union, MoneyGram, PayPal. Samples: 100% payment. Orders: 30% deposit, 70% before shipment.
