Company news

Fiber Bragg Gratings for fiber laser

Laser Mirror Gratings

China, 21th July, 2016: Optical passive components available at DK Photonics are significant in a number of industries such as telecommunication applications, fiber laser, etc. In order to better give our fiber laser customers to do matching service, DK Photonics work with a Chinese optical research institute, after more than half a year’s efforts, and finally produced the FBG Mirrors used for fiber laser.

FBG Mirrors are based on the reflective properties of the Fiber Bragg Grating (FBG) written in the core of an optical fiber waveguide. FBG mirrors’ principal application is to use a high and low reflector to form a stable laser cavity having the lasing wavelength selected by the low reflector.

Fiber Bragg grating (FBG) is a distributed reflector constructed in an optical fiber short segment that allows reflecting particular wavelengths and transmitting the rest of them. The periodic variation of the fiber core refractive index generates a wavelength-specific dielectric mirror, which allows reflecting specific wavelengths. FBG can be used as a high reflector (HR) and output coupler (OC) to make a laser cavity in a fiber laser. Rare earth doped optical fiber increases the laser gain. The major advantage of all-fiber systems where free space mirrors are replaced with a pair of fiber Bragg gratings (FBG’s) is that the realignment process is no longer needed for the entire system functioning period, since FBG is spliced directly to the doped finer and never needs adjusting.

DK Photonics can provide varied wavelengths FBG, such as 1018nm, 1053nm, 1064nm, 1080nm, 1550nm, 1950nm, 2020nm, 2040nm; and can write in all common passive optical fibers, such as 6/125DCF,10/125DCF,15/130DCF,20/125DCF,25/250DCF,30/250DCF,20/400DC Fiber, PM or non-PM types are available. The Max. handling power up to 1000W. The following is main parameter or our FBG:

Parameters Values
Center Wavelength(nm) 1018nm, 1053nm, 1064nm, 1080nm, 1550nm, 1950nm, 2020nm, 2040nm
Wavelength accuracy 0.2nm
High Re­ector / Output Coupler HR OC
Reflectivity ≥99% 3%~20%
Bandwidth 1~3nm 0.2~1nm
Fiber Type 10/125 DCF,15/130DCF, 20/125 DCF,25/250 DCF,30/250 DCF,20/400 DC Fiber, PM or non-PM types are available
Power Handling(core) 20W, 50W, 100W, 500W,1000W.

Applications

FBGs offer multiple applications. It can replace conventional dielectric mirrors to provide optical feedback. It can be also used to create a multi-wavelength Raman fiber laser.

Fiber lasers offer a compact, electrically efficient alternative to Ar-Kr and Nd:YAG technologies. The FBG can be applied to fiber lasers of any type:

  • Single frequency fiber lasers;
  • Raman fiber laser;
  • Fixed frequency visible wavelength lasers;
  • Tunable frequency visible wavelength lasers;
  • Ytterbium doped fiber lasers;
  • Q-switched fiber lasers;
  • Pulsed fiber lasers;
  • Stabilized multi-mode emission sources;
  • Fine optical fiber responder, etc.

To obtain more information about the products, visit http://www.dkphotonics.com/.

About DK Photonics

The DK Photonics claims that they even provide customized solutions to their patrons. Those industries who wish their products to be distinctive can contact them for the same. The team mentions that they have passed the ISO9001 quality tests and hence, there is no compromise in this aspect.

Hi there,

Since the Chinese new year is coming,please arrange ahead of the issues in order to facilitate all the customers,suppliers and colleagues.And details list as below:

Holiday time:
Our factory will close from February 1, 2016 to February 14, 2016;
Our office will close from February 5, 2016 to February 14, 2016.
DK Photonics will resume normal work on February 15, 2016. Please make reasonable plan and arrange the schedule before the CNY.

If you have any inquiry or emergency,during our leave, please feel free to contact: [email protected] .We will try the best to comment back and keep you posted A.S.A.P.

We really appreciate your support for DK Photonics in the past whole year! We will try our best to provide you good products and services as we did before.

We wish you all the best!

DK Photonics Team
January 8, 2016

The key components in a WDM system are the optical wavelength multiplexer (MUX), and the de-multiplexer (DEMUX). In general, a CWDM (coarse WDM) MUX/DEMUX deals with small numbers of wavelengths, typically eight, but with large spans between wavelengths (spaced typically at around 20nm). A DWDM (dense WDM) MUX/DEMUX deals with narrower wavelength spans (as small as 0.8nm, 0.4nm or even 0.2nm), and can accommodate 40, 80, or even 160 wavelengths.

The one kind of DK Photonics LGX CWDM MUX/DEMUX modules are bi-directional passive optical multiplexers and de-multiplexers, allowing multiple optical signals at different wavelengths to pass through a single optical fiber strand.

simplex-bidi-transmission-cwdm-mux-demux

The second DK Photonics ABS CWDM MUX/DEMUX modules are duplex fiber link bi-directional multiplexers and de-multiplexers, allowing multiple optical signals’ at different wavelengths to pass through duplex optical fiber.

duplex-bidi-transmission-cwdm-mux-demux

The last one kind is simplex directional CWDM MUX only or CWDM DEMUX only. The kind of mux and demux must be used with each other.

simplex-directional-transmission-cwdm-mux-demux

CWDM MUX/DEMUX solution lets operators make full use of available fiber bandwidth in local loop and enterprise architectures. Our CWDM MUX/DEMUX modules split up to 18 channels (20 nm spaced) to a single fiber. The standard packages are ABS Plastic Box, 19″ Rack Mount Chassis CWDM Mux/Demux  and LGX Metal Box Mux/Demux. No matter what kinds of connectors (such as FC, ST, SC, LC, etc.) are all available and we can also mix connectors on one device.

CWDM MUX+DEMUX 8 Channels (Dual Fiber) Module

CWDM MUX+DEMUX 8 Channels (Dual Fiber) Module

DK Photonics offers a wide range of WDM (Wavelength Division Multiplexing) optical networking products that allow transport of any mix of services from 2Mbps up to 100Gbe over dark fiber and WDM networks providing for the entire set of the most demanding CWDM and DWDM network infrastructure needs.

Hi there,

Since the Chinese new year is coming,please arrange ahead of the issues in order to facilitate all the customers,suppliers and colleagues.And details list as below:

Holiday time:
Our factory will close from February 11, 2015 to February 24, 2015;
Our office will close from February 18, 2015 to February 24, 2015.
DK Photonics will resume normal work on February 25, 2015. Please make reasonable plan and arrange the schedule before the CNY.

If you have any inquiry or emergency,during our leave, please feel free to contact: [email protected] .We will try the best to comment back and keep you posted A.S.A.P.

We really appreciate your support for DK Photonics in the past whole year! We will try our best to provide you good products and services as we did before.

We wish you all the best!

DK Photonics Team
January 16, 2015

Welcome to our new website & blog

A resource for entrepreneurs and a place for new ideas about Fiber laser and Fiber Amplifier

we are excited to introduce you to our new blog & website. This is where we plan to share our thoughts on the the world of the Fiber laser and Fiber Amplifier. We also plan to give you updates on DK Photonics’s activities, including the latest news on our startups, program events & partners around the world. Or, we may just share whatever is on our mind.

Take a tour of our new website.

This is just a taste. We have numerous other activities in the works – events, partnerships & opportunities for entrepreneurs to participate in our program in various ways.

So, I invite you to take a tour around our new blog, bookmark our website & connect with us on social media (Facebook, Twitter, LinkedIn & Google+) to stay up to date on our news. We will have a lot of updates to share in the coming weeks & months.

1064nm High Power Isolator_Pump Laser Protector