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Solid State Lasers and Laser Diodes from RPMC Lasers Inc » Products » DFB

DFB Lasers – Distributed Feedback Lasers

Distributed Feedback (DFB) Lasers

What are Distributed Feedback (DFB) Laser Diodes?

A Distributed Feedback Laser (DFB) refers to laser diodes or quantum cascade lasers (QCLs), for example, in which the surface of the active region or gain medium is etched with a periodic structure or diffraction grating (Bragg grating) providing narrow linewidth.

This grating creates a one-dimensional interference grating, providing optical feedback. Essentially, this process allows only one wavelength to emit from the diode, rather than one center wavelength with a couple of lower power side wavelengths that you typically get from a standard Fabry-Perot laser diode. Distributed Feedback (DFB) Laser Diodes are single-frequency and offer a Narrow Linewidth with good side mode suppression ratio (SMSR).

Discreet-Mode (DM) Laser Diodes offer very similar performance to DFB Lasers. Discreet-Mode Laser Diodes are produced with a simple and low-cost fabrication process and have many advantages. For example, they have very high side mode suppression ratio, stable operation over a broad temperature range, narrow linewidth and low sensitivity to optical feedback. DM laser diodes are often described as DFB-like laser diodes.

Our Distributed Feedback DFB Laser Products

DFB laser diodes are available in free-space and fiber pigtailed versions, with wavelengths in the NIR, SWIR, & LWIR (from ≈1260nm to 16µm) spectral regions, providing narrow linewidths and up to 50mW output. Furthermore, packages include HHL, TO-Can, and fiber-coupled butterfly options. Finally, we offer a wide range of wavelengths and output powers to choose from in our DFB Lasers.

Deeper Dive into Distributed Feedback Lasers

Some DFB Laser Applications

Some popular DFB laser applications include various forms of gas sensing (e.g., molecular spectroscopy, TDLAS or tunable diode laser absorption spectroscopy), interferometry, fiber sensing, fiber optic communication, LIDAR, DIAL, and night vision applications.

Laser Diodes for Gas Sensing: Mode-Hop-Free Tunability with High SMSR

In a hypothetically perfect laser, all of the laser power produced would be contained within the main spectral peak. However, in reality, the power distribution is not as ideal and the side peaks or side modes of the laser profile contain some percentage of the total output power. A Distributed Feedback (DFB) laser’s side-mode suppression ratio (SMSR) is a value that explains the amplitude delta between the main mode and the most significant side mode in decibel units (noise ratio). A typical SMSR value would be greater than 30dB, which indicates that most of the power resides in the main spectral peak. High-quality, high-performance DFB laser diodes boast even higher SMSR values, and thus generate a greater ratio of total power within the main mode, compared to the side modes.

Read the full article here.

Groundbreaking New QCL Wavelength Range from 10µm to 17µm!

A new class of Distributed Feedback (DFB) QCLs has been developed at the University of Montpellier, France, in a joint laboratory with CNRS. The unique aspect is the use of different III-V semiconductor materials to fabricate the active region of the lasers. These materials are part of the antimonide family, a specialty of the University of Montpellier for decades. The foundation of QCLs consists of artificial heterostructure alternating nanometer-scale quantum wells and barrier layers. While the standard QCL uses InGaAs and AlInAs on an InP substrate – the basis of the optoelectronics telecom industry – this novel QCL technology is based on InAs and AlSb. These materials’ specific properties enabled the expansion of QCL wavelength range from 2.6µm to 25µm [1, 2]. High-performance laser sources have been demonstrated recently in the range 10 to 20µm [3-5], with powers in the milliwatts range emitted at room temperature in a continuous wave. An efficient DFB process was also demonstrated for the fabrication of single-frequency tunable lasers suitable for spectroscopy applications [6]

Read the full article here.

How Can We Help?

With over 25 years experience providing distributed feedback DFB lasers to researchers and OEM integrators working in various markets and applications, and 1000s of units fielded, we have the experience to ensure you get the right product for the application. Working with RPMC ensures you are getting trusted advice from our knowledgeable and technical staff on a wide range of laser products.  RPMC and our manufacturers are willing and able to provide custom solutions for your unique application.

If you have any questions, or if you would like some assistance please Contact Us here. Furthermore, you can email us at [email protected] to talk to a knowledgeable Product Manager.

Alternatively, use the filters on this page to assist in narrowing down the selection of distributed feedback DFB lasers for sale. Finally, head to our Knowledge Center with our Lasers 101 page and Blogs, Whitepapers, and FAQ pages for further, in-depth reading.

Finally, check out our Limited Supply – In Stock – Buy Now page: This page contains an ever-changing assortment of various types of new lasers at marked-down/discount prices.

 

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Picture Part Number Wavelength (nm) Output power (W) Mode Output Linewidth Duty Package
REP1260-1300 1260-1300 0.009, 0.012, 0.020, 0.022 Single-Mode PM Fiber, SM Fiber, Free Space Narrow CW 5.6mm, TO-39, Butterfly FC
REP1380-1400 1380-1400 0.008, 0.012 Single-Mode PM Fiber, SM Fiber, Free Space Narrow CW 5.6mm, TO-39, Butterfly FC
REP1500-1560 1500-1560 0.0015, 0.003, 0.005, 0.008, 0.014, 0.016, 0.020, 0.022 Single-Mode PM Fiber, SM Fiber, Free Space Narrow CW 5.6mm, TO-39, Butterfly FC
REP1550nm-1560nm 1560-1600 0.006, 0.014 Single-Mode PM Fiber, SM Fiber, Free Space Narrow CW 5.6mm, TO-39, Butterfly FC
REP1635-1670 1635-1670 0.006, 0.008, 0.020 Single-Mode PM Fiber, SM Fiber, Free Space Narrow CW 5.6mm, TO-39, Butterfly FC
REP1678-1720 1678-1720 0.005 Single-Mode PM Fiber, SM Fiber, Free Space Narrow CW 5.6mm, TO-39, Butterfly FC
REP1720-1770 1720-1770 0.003, 0.006, 0.020 Single-Mode PM Fiber, SM Fiber, Free Space Narrow CW 5.6mm, TO-39, Butterfly FC
REP1850-1880 1850-1880 0.003, 0.0045, 0.005, 0.008, 0.014 Single-Mode PM Fiber, SM Fiber, Free Space Narrow CW 5.6mm, TO-39, Butterfly FC
REP1908-1970 1908-1970 0.002, 0.003, 0.020 Single-Mode PM Fiber, SM Fiber, Free Space Narrow CW 5.6mm, TO-39, Butterfly FC
REP1970-2053 1970-2053 0.0015, 0.002, 0.003, 0.004, 0.005, 0.014 Single-Mode PM Fiber, SM Fiber, Free Space Narrow CW 5.6mm, TO-39, Butterfly FC
REP2300-2333 2300-2333 0.002, 0.005 Single-Mode PM Fiber, SM Fiber Narrow CW TO-39, Butterfly FC
RWLP-1270S: 1270nm Single Mode Laser Diode RWLP-1270S 1270 0.002, 0.005, 0.010 Single-Mode PM Fiber, SM Fiber Narrow CW Coaxial, 8-pin HHL
RWLP-1290S: 1290nm Single Mode Laser Diode RWLP-1290S 1290 0.002, 0.005, 0.010 Single-Mode PM Fiber, SM Fiber Narrow CW Coaxial, 8-pin HHL
RWLP-1310S: 1310nm Single Mode Laser Diode RWLP-1310S 1310 0.002, 0.003, 0.005, 0.010, 0.015 Single-Mode PM Fiber, SM Fiber Narrow CW Coaxial, 8-pin HHL
RWLP-1330S: 1330nm Single Mode Laser Diode RWLP-1330S 1330 0.002, 0.005, 0.010 Single-Mode PM Fiber, SM Fiber Narrow CW Coaxial, 8-pin HHL
RWLP-1350S: 1350nm Single Mode Laser Diode RWLP-1350S 1350 0.002, 0.005, 0.010 Single-Mode PM Fiber, SM Fiber Narrow CW Coaxial, 8-pin HHL
RWLP-1370S: 1370nm Single Mode Laser Diode RWLP-1370S 1370 0.002, 0.005, 0.010 Single-Mode PM Fiber, SM Fiber Narrow CW Coaxial, 8-pin HHL
RWLP-1410S: 1410nm Single Mode Laser Diode RWLP-1410S 1410 0.002, 0.005, 0.010 Single-Mode PM Fiber, SM Fiber Narrow CW Coaxial, 8-pin HHL
RWLP-1430S: 1430nm Single Mode Laser Diode RWLP-1430S 1430 0.002, 0.005, 0.010 Single-Mode PM Fiber, SM Fiber Narrow CW Coaxial, 8-pin HHL
RWLP-1450S: 1450nm Single Mode Laser Diode RWLP-1450S 1450 0.002, 0.005, 0.010 Single-Mode PM Fiber, SM Fiber Narrow CW Coaxial, 8-pin HHL
RWLP-1470S: 1470nm Single Mode Laser Diode RWLP-1470S 1470 0.002, 0.005, 0.010 Single-Mode PM Fiber, SM Fiber Narrow CW Coaxial, 8-pin HHL
RWLP-1490S: 1490nm Single Mode Laser Diode RWLP-1490S 1490 0.002, 0.005, 0.010 Single-Mode PM Fiber, SM Fiber Narrow CW Coaxial, 8-pin HHL
RWLP-1510S: 1510nm Single Mode Laser Diode RWLP-1510S 1510 0.002, 0.005, 0.010 Single-Mode PM Fiber, SM Fiber Narrow CW Coaxial, 8-pin HHL
RWLP-1530S: 1530nm Single Mode Laser Diode RWLP-1530S 1530 0.002, 0.005, 0.010 Single-Mode PM Fiber, SM Fiber Narrow CW Coaxial, 8-pin HHL
RWLP-1550S: 1550nm Single Mode Laser Diode RWLP-1550S 1550 0.002, 0.003, 0.005, 0.010 Single-Mode PM Fiber, SM Fiber Narrow CW Coaxial, 8-pin HHL
RWLP-1570S: 1570nm Single Mode Laser Diode RWLP-1570S 1570 0.002, 0.005, 0.010 Single-Mode PM Fiber, SM Fiber Narrow CW Coaxial, 8-pin HHL
RWLP-1590S: 1590nm Single Mode Laser Diode RWLP-1590S 1590 0.002, 0.005, 0.008 Single-Mode PM Fiber, SM Fiber Narrow CW Coaxial, 8-pin HHL
RWLP-1610S: 1610nm Single Mode Laser Diode RWLP-1610S 1610 0.002, 0.005, 0.008 Single-Mode PM Fiber, SM Fiber Narrow CW Coaxial, 8-pin HHL
RWLP-1625S: 1625nm Single Mode Laser Diode RWLP-1625S 1625 0.002, 0.005, 0.008 Single-Mode PM Fiber, SM Fiber Narrow CW Coaxial, 8-pin HHL
RWLP-1650S: 1650nm Single Mode Laser Diode RWLP-1650S 1650 0.002, 0.005, 0.009 Single-Mode PM Fiber, SM Fiber Narrow CW Coaxial, 8-pin HHL
mirSense HHL UniMir 11.3um 11300 0.010 Single-Mode Free Space Narrow CW HHL
mirSense HHL UniMir 13.4um 13400 0.005 Single-Mode Free Space Narrow CW HHL
mirSense HHL UniMir 14.0um 14000 0.005 Single-Mode Free Space Narrow CW HHL
mirSense HHL UniMir 14.9um 14900 0.005 Single-Mode Free Space Narrow CW HHL
mirSense HHL UniMir 16.0um 16000 0.003 Single-Mode Free Space Narrow CW HHL
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REP Series

The REP series includes high-performance, tunable, single-frequency (DFB-like) diode lasers and Fabry-Perot laser diodes in wavelengths from 1270nm thru 2350nm, designed to address challenges in Gas Sensing, LIDAR, Spectroscopy, and Telecom. The REP series includes high-power and narrow linewidth options, covering various product ranges at the most popular wavelengths, providing customizable units with multiple packaging options, including the Fiber coupled 14-pin butterfly, TO39 (w/TEC), and TO56. For a complete module incorporating the fiber-coupled butterfly package with an integrated current driver and TEC controller, designed for ease of operation, it is the ideal platform for high stability gas detection or remote sensing.  See the DX1 Series.

RWLP Series

R3Z0-WSLP-905-050m-M-PD: 905nm Multimode Fiber Coupled Laser Diode

The RWLP series offers an affordable and versatile solution for your laser application needs with single-mode and multimode options and wavelengths from 405nm thru the IR region. With customizable options, our team can work with you to solve any challenges you may face. Rigorously tested for long-term reliability, the RWLP series ensures consistent performance and high beam quality. Perfect for integration, this series supports multiple applications including biological and analytical instrumentation. 

UniMir Series

mirSense UniMir HHLThe uniMir Series is a long-wavelength, single-frequency, DFB, CW Quantum Cascade Laser based on proprietary technology. The technology’s versatility allows them to address any wavelength between 10 and 18µm in CW and up to 21µm in pulsed mode. now commercially available in a sealed High Heat Load (HHL) package, with integrated collimating lens, thermistor, and thermoelectric cooler (TEC), well suited for integration into systems, or as a stand-alone turnkey system for R&D and detection applications.