Laser Output Coupler

A laser output coupler (OC) is a component of an optical resonator that allows the extraction of a portion of the light from the laser’s intracavity beam. It most often consists of a partially reflective mirror, allowing a certain portion of the intracavity beam to transmit through.

An output coupler is typically a partially reflective mirror that is placed at one end of the laser cavity. As the light circulates within the laser cavity, a portion of it is transmitted through the output coupler, while the rest is reflected back into the cavity to continue circulating. The amount of light transmitted through the output coupler is determined by its reflectivity, which can be adjusted to optimize the laser’s performance. 

Sample Output Coupler

$56lead time 3 weeks
  • Dia:12.7mm,Partial Coating

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The output coupler can be designed to transmit certain wavelengths of light by using a dielectric mirror with a specific coating. The coating can be designed to have a specific reflectivity at certain wavelengths, allowing for the selection of specific wavelengths to be transmitted through the output coupler. For example, Laser Output Couplers are available with design wavelengths of 532nm or 1064nm for use with Nd:YAG lasers

Why Output Coupler is needed?

Bouncing back some portion of the light into the laser cavity allows the light to continue circulating and being amplified by the laser medium. This process is necessary to achieve the high optical power and coherence that are characteristic of laser light. If all the light were to be output at once, the laser would not be able to achieve the necessary amplification and the output would not have the desired properties. 

  
wdt_ID Diameter(mm) Wavelength(nm) Reflectance(%) Angle of Incidence(°) Price(USD) Lead Time MOQ
1 12.7 1064,532 20%,40%,50%,60%,80% 0 56 3 weeks 7pcs
2 25.4 1064,532 20%,40%,50%,60%,80% 0 78 3 weeks 7pcs