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1μm : Thermal Lensing Compensation(TLC) Optics

TLC Optics logo

The TLC (Thermal Lensing Compensation) patent US 8,274,743 B2 optic design passively compensates thermal lensing for high power collimators and focusing lenses. Through the use of special optical materials and optic design, thermal lensing for lasers with powers in excess of 1KW is reduced to less than the Rayleigh range of the lens design. Figure 1 TLC Optics™ uses focusing objectives.

Haas Laser Technologies TLC Optics™ incorporates a balancing of the dn/dT between two high power laser optical materials, the thicknesses, air spacing and curvatures to minimize the thermal lensing between 20°C and 250°C using a proprietary optical design merit function. This means your application will be in focus from the moment the laser is first turned on to when it is turned off.

Thermal management of the lens mechanics is about the only means to mitigate thermal lensing but as optical glass, in general, is not a great thermal conductor there can be large temperature gradients across the lens that impacts its performance that even thermal management cannot handle. This means that most high power fiber laser applications require several minutes for the optical system to thermally stabilize before the shift in focus stays within the lasers focusing lens Rayleigh range(depth of focus).

Thermal Lensing Compensation TLC Optics Fig 2aThermal Lensing Compensation TLC Optics fig 2b

Figure 2a & 2b shows a simple fused silica best form singlet with an overlay of the same lens that has a 230°C temperature gradient applied. The blue rays are light focused at ambient temperature and the green rays represent the focus at the elevated temperature.

 

Figure 3

Figure 3 shows the close up the Haas TLC Optics™ in figure 1 with the same focal length and temperature gradient.

 

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Below is a list of TLC Optics.
Please call (973) 598-1150 for pricing and availability.
Haas Part Number C.A. Series Description Coating
TLCD-15012-035-900-1080 15mm 35mm F.L. x 12.5mm C.A. TLC Optic Set Broadband A/R 900nm - 1080nm
TLCT-30027-050-900-1100 30mm 50mm F.L. x 27.0mm C.A. TLC Optic Set High Power A/R 900nm - 1100nm
TLCT-30027-060-900-1100 30mm 60mm F.L. x 27.0mm C.A. TLC Optic Set High Power A/R 900nm - 1100nm
TLCT-30027-080-900-1100 30mm 80mm F.L. x 27.0mm C.A. TLC Optic Set High Power A/R 900nm - 1100nm
TLCT-30027-100-900-1100 30mm 100mm F.L. x 27.0mm C.A. TLC Optic Set High Power A/R 900nm - 1100nm
TLCT-30027-050-900-1080 30mm 50mm F.L. x 27.0mm C.A. TLC Optic Set Broadband A/R 900nm - 1080nm
TLCT-30027-060-900-1080 30mm 60mm F.L. x 27.0mm C.A. TLC Optic Set Broadband A/R 900nm - 1080nm
TLCT-30027-080-900-1080 30mm 80mm F.L. x 27.0mm C.A. TLC Optic Set Broadband A/R 900nm - 1080nm
TLCT-30027-100-900-1080 30mm 100mm F.L. x 27.0mm C.A. TLC Optic Set Broadband A/R 900nm - 1080nm
TLCD-30027-120-900-1080 30mm 120mm F.L. x 27.0mm C.A. TLC Optic Set Broadband A/R 900nm - 1080nm
TLCD-30027-150-900-1080 30mm 150mm F.L. x 27.0mm C.A.TLC Optic Set Broadband A/R 900nm - 1080nm
TLCD-50047-100-900-1100 50mm 100mm F.L. x 47.0mm C.A.TLC Optic Set High Power A/R 900nm - 1100nm
TLCD-50047-120-900-1100 50mm 120mm F.L. x 47.0mm C.A.TLC Optic Set High Power A/R 900nm - 1100nm
TLCD-50047-160-900-1100 50mm 160mm F.L. x 47.0mm C.A.TLC Optic Set High Power A/R 900nm - 1100nm
TLCD-50047-200-900-1100 50mm 200mm F.L. x 47.0mm C.A. TLC Optic Set High Power A/R 900nm - 1100nm
TLCD-50047-250-900-1100 50mm 250mm F.L. x 47.0mm C.A. TLC Optic Set High Power A/R 900nm - 1100nm
TLCD-50047-500-900-1100 50mm 500mm F.L. x 47.0mm C.A. TLC Optic Set High Power A/R 900nm - 1100nm
TLCD-50047-100-900-1080 50mm 100mm F.L. x 47.0mm C.A. TLC Optic Set Broadband A/R 900nm - 1080nm
TLCD-50047-120-900-1080 50mm 120mm F.L. x 47.0mm C.A. TLC Optic Set Broadband A/R 900nm - 1080nm
TLCD-50047-160-900-1080 50mm 160mm F.L. x 47.0mm C.A. TLC Optic Set Broadband A/R 900nm - 1080nm
TLCD-50047-200-900-1080 50mm 200mm F.L. x 47.0mm C.A. TLC Optic Set Broadband A/R 900nm - 1080nm
TLCD-50047-250-900-1080 50mm 250mm F.L. x 47.0mm C.A. TLC Optic Set Broadband A/R 900nm - 1080nm
TLCD-50047-500-900-1080 50mm 500mm F.L. x 47.0mm C.A. TLC Optic Set Broadband A/R 900nm - 1080nm

 

Additional options available upon request

We would be happy to discuss a custom designed solution that's right for any project, large or small. For additional information, contact a Haas Laser Technology sales representative today. (973) 598-1150


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