1550nm 5mW/10mW/20mW DFB Laser Diode 14-Pin Butterfly SM/PM Fiber Laser
Machine Packaging High Power Manufacturers DFB FP Laser Diode
Product Detail
DFB HCW-PLD1550Dxx (1550nm-1552nm) Can be A,B ,C E , S-type version and in a coaxial TEC package version as well.
DFB (Distributed Feedback Laser) laser use the grating filter device to make the device have only one longitudinal-mode output based on the FP laser. DFB generally also use two wavelengths 1310nm and 1550nm, divides into refrigeration and No-refrigeration, mainly used for high data rate long-distance transmission. The transmission distance is generally above 40 kilometers, the rate is above 1.25G.
Performance Parameters of DFB Laser
- Working wavelength: Emitted the center wavelength of spectrum by laser.
- The suppression ratio of side mode: The power ratio of the main mode and the maximum side mode of the laser.
- Decreased the spectral width of 20dB: Decreased the spectral width of 20dB by the highest point of the laser output spectrum.
- Threshold current: The laser send out a very good laser when the working current of the device exceeds the threshold current.
- Output power: The optical power emitted by the output port of the laser.
| 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 |
Features
Built-in optical isolator
Low capacitance and low dark current
High stability of DFB lasers die
Low threshold current, low operating current
Integrated high isolation, low insertion loss
FP (Fabry-perot) laser is mainly used for low data rate short-distance transmission, the transmission distance is generally within 20 km, the rate is generally within 1.25G. FP is divided into two wavelengths, 1310nm/1550nm.
Some customer in order to decrease the cost, so chose the FP laser to make the 1.25G 40km module. Reason by make the module reach the 40km transmission distance, the engineer must adjust the output power rather bigger to meet the distance, but it will make the laser ageing fastly cause more issue.
Performance Parameters of FP Laser
- Working wavelength: Emitted the center wavelength of spectrum by laser.
- The width of spectral: RMS spectral width of multi-longitudinal mode laser.
- Threshold current: The laser send out a very good laser when the working current of the device exceeds the threshold current.
- Output power: The optical power emitted by the output port of the laser.
The Difference Between FP And DFB Laser
The main difference can be got by the form between the FP and DFB laser is that the spectral width is different. The spectral width of the DFB laser is generally narrow, is a single longitudinal mode with distributed negative feedback. While the spectral width of the FP laser is relatively wide, it is a multi-longitudinal mode laser. The working wavelength, threshold current and voltage are also different.
Thanks for your reading! Hope these shares will give you some understanding of FP and DFB lasers! Welcome to discuss with the industry's elite together, also hope to provide your valuable views and suggestion, creating progress together with you!
Frequently Asked Questions
Q1: Are your trading company or manufacture?
A: We are factory verified by TUV
Q2: What is your delivery time?
A: Generally, sample: 3~5 working days. formal order: 7-10 working days.
Q3: Do you provide OEM service?
A: Yes, we can print your logo or label on the products or on the box.
Q4: Can you provide free samples?
A: Some of low value samples can be free for you, but you need pay for the shipping cost.
Q5: How can you guarentee the quality?
A: Build on our perfect quality management system, all of our products were 100% tested before the shipment.
Q6: What's your payment terms?
A: We accept T/T, Western Union, Money Gram, Paypal. For samples: 100% payment. Formal order: 30% as deposit, 70% balance payment before shipment.
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