Laser Diode Stabilizer Fibre Gratings (as External Cavity)

In many applications, the wavelength of a pump laser diode needs to be stabilized during operation. Fibre Bragg gratings are a simple and good approach for locking the wavelength of the pump laser diode. Fibre gratings are also a simple and efficient approach to stabilize the wavelength of any laser diode device.

We can offer fiber gratings for 980 nm pumping laser diodes (model number OEFGS-980 and 1480nm pumping laser diodes (model number OEFGS-148). We are also capable of writing the fiber gratings for 850 nm laser diodes and other wavelength laser diodes.
The fiber grating forms an external cavity and reflects a very small part of the signal to act as a feedback thus stabilizing the pump wavelength.

We also provide laser diode stabilizers with lensed fibres to provide complete solutions for 1480 nm pump lasers and 980 nm pump laser package. Other processes like AR coating, ferrule mounting, fiber tip metallization and connectorization can also be done in-house.

Usually the 1480 nm pump laser will use conical lensed fiber to couple the laser diode and the 980 nm pump laser will use wedged lensed fibre to do the coupling.

External cavity fibre gratings can also narrow the width of the laser diode spectrum, by properly designing the laser diode. We provide fibre gratings for laser external cavities with central wavelengths from 600 nm to 2000 nm. The bandwidth can vary from 0.02 nm to 2 nm, and the reflectivity from 0.3% to 90%.

Features:


Figure 1: The reflection spectrum of fibre gratings for 980 nm laser diode stabilizer

980 nm Stabilizer Specifications:

 
Parameter Unit Value Tolerance
Central wavelength nm 960 - 1060 ± 0.5
Bandwidth (FWHM) nm 0.5 ± 0.1
Reflectivity % 5 ± 1
Fibre type - Flexcor 1060 Other fibre types available
Fibre length m 1.5 Other lengths available
Tension testing kpsi 100 Typical
Recoating - Acrylate Typical

Figure 2: The transmission spectrum of fiber gratings for 1480 nm laser diode stabilizer

1480 nm Stabilizer Specifications:

 
Parameter Unit Value Tolerance
Central wavelength nm 1460 - 1490 ± 0.5
Bandwidth (FWHM) nm 1.0 ± 0.2
Reflectivity % 9 ± 1
Fibre type - SMF-28 Other fibre types available
Fibre length m 1.5 Other lengths available
Tension testing kpsi 100 Typical
Recoating - Acrylate Typical

Laser Diode External Cavity Fibre Grating Specifications:

 
Parameter Unit Value Tolerance
Central wavelength nm 600 - 2000 ± 0.25
Bandwidth (FWHM) nm 0.02 - 2.0 ± 0.2
Reflectivity % 0.3 - 90 ± 5
Fibre type - SM, MM, PM, doped Other fibre types available
Fibre length m 1.5 Other lengths available
Tension testing kpsi 50 - 100 Typical
Recoating - Acrylate, polyimide Typical

Note: All specifications are subject to change without notice.

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