DFB / DBR单模二极管放大器

DFB和DBR二极管激光器都是空间和纵向单模激光器。DFB是固定波长单模激光器；DBR是可调谐单模激光器。单模辐射由带激光器芯片的布拉格光栅实施。激光器芯片由复合半导体材料的金属有机物气象外延生长而成。发射宽度范围3-7微米。由于激光材料和周围空气的折射率差，所以激光器芯片表面可以看做腔镜。它的后表面是高反膜，前表面是高质量的增透膜。

DFB / DBR Diode Lasers, Single Mode

Single Mode

Description:

Distributed Feedback (DFB) Diode Lasers are fixed wavelength single mode diode lasers. Distributed Bragg Reflector (DBR) Diode Lasers are tunable single mode diode lasers. The single mode emission is enforced by a Bragg grating with the laser chip.

Distributed Feedback (DFB):
Distributed Feedback (DFB) Diode Lasers are fixed wavelength single mode diode lasers. Typical geometrical sizes of the laser chip are 1000µm x 500µm x 200µm (length x width x height). The laser chip is grown by MOVPE of compound semiconductor material. The optical gain is provided by double heterostructure which include several Quantum Wells for electronic confinement. Typcal emitter width range between 3µm and 7µm. The single mode emission is enforced by a Bragg grating with the laser chip. The surfaces of the laser chip act as cavity mirrors due to the difference of the refractive index of the laser material and the surrounding air. The rear facet of the laser chip is provided with a high reflection coating. The front facet of the laser chip is provided with a high quality antireflection coating  for avoiding the Fabry Perot modes of the laser chip. Distributed Feedback (DFB) Diode Lasers are available at almost any wavelength between 760nm and 2800nm.

Packaging Options:
DFB Lasers are available in 9mm TO-cans, TO3 cans with an integrated thermoelectric cooler or butterfly packages with thermoelectric cooler and single mode fiber coupling. Please note that the output power is reduced to typically 20% of the nominal power for the fiber coupled butterfly versions.

Customized Wavelength Selection:
Available wavelength range from 750nm to 1630nm. Due to a special manufacturing method, customized wavelength can be provided with a selection of below 2nm even for single units. Please check our most commonly requested wavelength. 

Distributed Bragg Reflector  (DBR):   
Distributed Bragg Reflector (DBR) Diode Lasers are tunable single mode diode lasers. Typical geometrical sizes of the laser chip are 1000µm x 500µm x 200µm (length x width x height). The laser chip is grown by MOVPE of compound semiconductor material. The optical gain is provided by double heterostructure which include several Quantum Wells for electronic confinement. Typcal emitter width range between 3µm and 7µm. The single mode emission is enforced by a Bragg grating with the laser chip. The surfaces of the laser chip act as cavity mirrors due to the difference of the refractive index of the laser material and the surrounding air. The rear facet of the laser chip is provided with a high reflection coating. The emission wavelength of the DBR laser is tuned by a synchronized changing the current of the Bragg and the Phase segment of the laser. Distributed Bragg Reflector (DBR) Diode Lasers are available with up to 100mW at 1063nm and 80mW at 1083nm. These diode lasers are longitudinally and spatially single mode. They can be tuned up to 100GHz mode-hop free. Please check our data sheets.

Packaging Options:DBR Lasers are available in 9mm TO-cans, TO3 cans with an integrated thermoelectric cooler or butterfly packages with thermoelectric cooler and single mode fiber coupling. Please note that the output power is reduced to typically 20% of the nominal power for the fiber coupled butterfly versions.

Specifications

Description:
Distributed Feedback (DFB) and Distributed Bragg Reflector (DBR) Diode Lasers are spatially and longitudinally single mode diode lasers.

Customized Wavelength Selection:
Available wavelength range from 750nm to 2800nm. Due to a special manufacturing method, customized wavelength can be provided with a selection of below 2nm even for single units.  Please find our specifications on the most common types in the table below.

Legend: Data below is wavelength specific and an example of 780nm.