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Low GDD ultrafast laser mirrors designed for use with Yb:YAG (515nm, 1030nm), Yb:KYW (1030nm), and Yb:KGW (1030nm) diode-pumped solid-state lasers (DPSSL) and laser systems.

  • Ion beam sputtered (IBS) coating perfect for demanding laser applications.
  • Reflection > 99.9% available as 0° and 45° AOI options. 
  • Low Group delay dispersion (GDD) < 20 fs2 ideal for ultrafast pulse lasers.
  • High laser damage threshold (LDT).
  • Advanced option with superior LDT for improved optic lifetime.  
  • Stress compensating coating (SCC) to improve the surface flatness.
  • Precision <20/10 surface quality to minimise scattering. 

Material:
Diameter:
Thickness:
Surface Quality S1: 

Surface Quality S2:
Flatness Clear Aperture:
Parallelism:
Chamfer:
Coating S1:

UV Fused Silica
+0/-0.1mm
+/-0.1mm
< 10/5 for 12.7mm/25.4mm diameters
< 20/10 for 50.8mm diameter
< 80/50
80% or specified aperture
< 5 arc mins
0.1-0.4mm
Rs>99.95% & Rp>99.9% @ 500-530nm, AOI 45°, |GDD Rs, Rp| < 20 fs2
R>99.9% @ 500-530nm, AOI 0°, |GDD R| < 10 fs2

Rs>99.95% & Rp>99.9% @ 1010-1050nm, AOI 45°, |GDD Rs| < 10 fs2, |GDD Rp| <20 fs2
R>99.9% @ 1010-1050nm, AOI 0°, |GDD R| < 15 fs2



A stress compensating coating (SCC) can be applied to side 2 to increase the surface accuracy, this would generate a 4-6 week lead time. 

Custom low GDD ultrafast laser line mirrors are also available upon request with custom sizes between 3 to 250mm and coating wavelength ranges between 200-5000nm. Contact us with your product enquiry.

16 Items

Name Diameter (mm) Thickness (mm) Wavelength range (nm) Coating S1 Coating S2 AOI (°) Flatness Type Price Buy
LLM4639 50.8 9.52 1010-1050 Rs>99.95% & Rp>99.9% No 45 <λ/8 over 35mm Advanced
£440.50
LLM3954 50.8 9.52 1010-1050 Rs>99.95% & Rp>99.9% SCC 45 <λ/8 over CA Advanced
£485.50
LLM4640 12.7 6.35 1010-1050 Rs>99.95% & Rp>99.9% No 45 <λ/8 over CA Advanced
£205.00
LLM3955 25.4 6.35 1010-1050 Rs>99.95% & Rp>99.9% SCC 45 <λ/10 over CA Advanced
£245.50
LLM4638 50.8 9.52 500-530 R>99.9% No 0 < λ/8 over 29mm Standard
£379.50
LLM3647 50.8 9.52 500-530 Rs>99.95% & Rp>99.9% SCC 45 < λ/8 over CA Standard
£415.00
LLM2061 50.8 9.52 1010-1050 R>99.9% SCC 0 < λ/8 over CA Standard
£415.00
LLM2371 50.8 9.52 1010-1050 Rs>99.95% & Rp>99.9% SCC 45 < λ/8 over CA Standard
£415.00
LLM2372 25.4 6.35 500-530 R>99.9% No 0 < λ/8 over 17mm Standard
£175.50
LLM2369 25.4 6.35 500-530 Rs>99.95% & Rp>99.9% SCC 45 < λ/8 over CA Standard
£175.50
LLM2368 25.4 6.35 1010-1050 R>99.9% SCC 0 < λ/8 over CA Standard
£175.50
LLM2318 25.4 6.35 1010-1030 Rs>99.95% & Rp>99.9% SCC 45 < λ/8 over CA Standard
£175.50
LLM2947 12.7 6.35 500-530 Rs>99.95% & Rp>99.9% No 45 < λ/8 over CA Standard
£152.50
LLM0889 12.7 6.35 500-530 R>99.9% No 0 < λ/8 over CA Standard
£152.50
LLM3248 12.7 6.35 1010-1050 R>99.9% No 0 < λ/8 over 10mm Standard
£152.50
LLM2616 12.7 6.35 1010-1050 Rs>99.95% & Rp>99.9% No 45 < λ/8 over 10mm Standard
£152.50

16 Items

1

Low GDD Ultrafast Laser Mirrors

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Design W/L (nm)
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