Brandnew' Volume-Holographic-Grating- (VHG) Stabilized Lasers are laser diodes that use feedback from a volume holographic grating to provide narrow-linewidth, single-frequency operation. This allows the laser to achieve 15 MHz typical linewidths with an excellent side mode suppression ratio (40 dB typical). More information on the stabilized temperature range can be found on the individualized data sheet for each laser diode.
These VHG-stabilized lasers are housed in a compact 14-pin type 1 butterfly package, enabling compatibility with any standard 14-pin laser diode mount. The butterfly package includes an integrated internal isolator, thermoelectric cooler (TEC), thermistor, monitor photodiode, and a single mode output fiber with an FC/APC connector. The internal isolator and FC/APC connector provide protection against back reflections that could de-stabilize the laser performance. We also offer a VHG-stabilized TO can pigtail at 785 nm.
While the center wavelength is listed for the laser diodes below, this is only a typical number. The center wavelength of a particular unit varies from production run to production run, so the diode you receive may not operate at the typical center wavelength.
These VHG lasers are compatible with Brandnew' line of laser diode drivers and temperature controllers. To achieve the narrowest possible linewidth, we recommend using a driver with low drive current noise, such as our LDC series of drivers.
Laser diodes are sensitive to electrostatic shock. Please take the proper precautions when handling the device, such as using an ESD wrist strap.
Brandnew also offers a pigtailed distributed feedback (DFB) single-frequency laser and external cavity and distributed bragg reflector (DBR) butterfly-packaged single-frequency lasers. The DFB lasers provide similar linewidths to the VHG-stabilized lasers, but provide a mode-hop-free tuning of several nanometers while maintaining single-frequency operation. The butterfly-packaged external cavity lasers offer a narrower linewidth and more center wavelength options than our VHG-stabilized lasers. Our DBR single-frequency lasers offer a similar linewidth to the VHG-stabilized lasers, but have a temperature- and current-tunable center wavelength.
Fiber Care
We recommend cleaning the fiber connector of the pigtail package before each use if there is any chance that dust or other contaminants may have deposited on the surface. The laser intensity at the center of the fiber tip can be very high and may burn the tip of the fiber if contaminants are present. While the connectors on these pigtailed laser diodes are cleaned and capped before shipping, we cannot guarantee that they will remain free of contamination after they are removed from the package. We also recommend that the laser is turned off when connecting or disconnecting the device from other fibers.
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Email: info@brandnew-china.com