Low GDD Ultrafast Mirrors for 460 - 590 nm


  • Designed for 2nd Harmonic of Yb:Glass, Yb:YAG, and Nd:YAG Lasers
  • Greater than 99% Reflectance over 460 - 590 nm
  • Group Delay Dispersion < 30 fs²

UM10-45G

(Ø1")

UM05-45G

(Ø1/2")

Application Idea

UM10-45G Mounted in a Ø1" Polaris Mount

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Item # UM05-45G UM10-45G
Design Wavelength Range 460 - 590 nm
Diameter 1/2" (12.7 mm) 1" (25.4 mm)
Diameter Tolerance +0.00 / -0.10 mm
Thickness 6.4 mm (0.25") 9.5 mm (0.37")
Thickness Tolerance ±0.20 mm
Clear Aperture >80% of Diameter
Reflectance Rs > 99% (460 - 590 nm)
Rp > 99% (480 - 560 nm)
Angle of Incidence 45°
Group Delay Dispersion |GDDs| < 30 fs² (460 - 590 nm)
|GDDp| < 30 fs² (480 - 560 nm)
Substrate Fused Silica
Front Surface Flatness λ/10 at 632.8 nm
Over Clear Aperture
Front Surface Quality 20-10 Scratch-Dig
Parallelism ≤3 arcmin
Back Surface Polished

Features

  • Designed for Frequency-Doubled Ultrafast Yb and Nd Lasers
  • Ideal for Laser Pulses Shorter than 250 fs
  • Low Group Delay Dispersion: |GDD| < 30 fs²
  • Available in Ø1/2" and Ø1" Sizes
  • For Use at 45° AOI

These Low Group Delay Dispersion (GDD) Ultrafast Mirrors provide high reflectance and low group delay dispersion in the 460 - 590 nm range. This wavelength range is optimized for the second harmonic of Ytterbium (Yb) and Neodymium (Nd) lasers. These mirrors are ideal for applications where pulse broadening is a concern and are designed for a 45° angle of incidence. The dielectric coating is applied with an ion-beam-sputtering (IBS) technique, providing a highly controlled and durable dielectric thin film coating.

These mirrors offer an ideal combination of greater than 99% reflectance and less than 30 fs² GDD. For details, please see the Graphs tab.

Our low GDD mirrors are available with either a 1/2" or 1" diameter. The edge of each optic is engraved with the item number and an arrowhead pointing to the coated surface. The back surface of these mirrors is polished so that the small percentage of light that leaks through the reflective coating may be used for applications such as power monitoring.

In addition to the low GDD mirrors here, Thorlabs also offers low GDD mirrors for various other wavelength ranges. For mirrors designed for the fundamental harmonic of Ytterbium (Yb) and Neodymium (Nd) lasers, see our Low GDD Ultrafast Mirrors for 970 - 1150 nm. For our full selection of optics for ultrafast applications, please see the Ultrafast Optics tab.

To characterize the dispersion properties of these mirrors, including the phase, group delay, GDD, third-order dispersion, and fourth-order dispersion, please see our Chromatis™ dispersion measurement system.

Figures 2.1 and 2.2 are theoretical results of the reflectance and the group delay dispersion and represent typical performance of the coating. Both plots are shown for an AOI of 45°.


Click to Enlarge
Click Here for Raw Data
Figure 2.1  The shaded region represents the specified wavelength range where Rs > 99%.

Click to Enlarge
Click Here for Raw Data
Figure 2.2  The shaded region represents the wavelength range where |GDD| <30 fs² for s-polarized light. The GDD values fluctuate rapidly outside of the design wavelength range.

Thorlabs offers a wide selection of optics optimized for use with Nd:YAG lasers. Please see below for more information.


Nd:YAG Optics Selection
Dielectric Mirrors Ultrafast Mirrors
Laser Line Mirrors, 1064 nm, 532 nm, 355 nm, 266 nm Right-Angle Prism Mirrors, Nd:YAG Laser Lines Cage Cube-Mounted Turning Prism Mirrors Nd:Yag Ultrafast Mirrors
Laser Line Mirrors,
1064 nm, 532 nm, 355 nm, 266 nm		 Right-Angle Prism Mirrors,
1064 nm, 532 nm		 Cage Cube-Mounted Prism Mirrors,
1064 nm, 532 nm		 Low GDD Ultrafast Mirrors,
1064 nm or 532 nm
Beamsplitters Wave Plates
Harmonic Beamsplitters, 1064 nm, 532 nm, 355 nm, 266 nm High-Power Polarizing Beamsplitter Cubes, 1064 nm, 532 nm
Harmonic Beamsplitters,
1064 nm, 532 nm, 355 nm, 266 nm		 High-Power Polarizing Beamsplitter Cubes,
1064 nm, 532 nm: Unmounted or Mounted		 Non-Polarizing Plate Beamsplitters,
1064 nm, 532 nm		 Dual Wavelength Multi-Order Wave Plates,
1064 nm / 532 nm
Attenuators Filters Objectives Doublet Lenses
Laser Line Filters, 532 nm High Power Focusing Objectives, 1064 nm, 532 nm Air-Spaced Doublets, 1064 nm, 532 nm
Laser Beam Attenuator,
1064 nm / 532 nm		 Hard-Coated Bandpass Filters,
1064 nm or 532 nm		 High Power Focusing Objectives,
1064 nm, 532 nm		 Air-Spaced Doublets,
1064 nm, 532 nm
Spherical Singlet Lenses
UVFS Plano-Convex Lenses, 1064 nm, 532 nm
N-BK7 Plano-Convex Lenses, Unmounted: 1064 nm / 532 nm UVFS Plano-Convex Lenses:
1064 nm: Unmounted
532 nm: Unmounted
1064 nm / 532 nm: Unmounted or Mounted		 UVFS Bi-Convex Lenses, Unmounted:
1064 nm, 532 nm, or 1064 nm / 532 nm		 UVFS Plano-Concave Lenses, Unmounted:
1064 nm, 532 nm, or 1064 nm / 532 nm

Posted Comments:
Fernando Manuel DA SILVA RIBEIRO  (posted 2021-07-07 02:27:38.897)
Dear Mr(s). Do you have the damage threshold data for this mirrors? I am particularly interested in the 515nm wavelength in the nano- and femto- second regimes. How they compare with the UM10-Y2HP?
YLohia  (posted 2021-07-12 08:05:43.0)
Hello, please see our comment below (dated 2018-10-04) on the damage thresholds of these mirrors. The test parameters were 200 fs pulses at 200 kHz rep rate. Unfortunately, we do not have data for ns regimes at the moment, so we suggest following the same damage threshold guidelines as the femtosecond regime.
Peter.Butler  (posted 2018-10-03 09:27:04.29)
Please you provide the damage threshold for these mirrors. I am particularly interested in using these mirrors with a 517 nm expanded to 8 mm diameter beam, up to 4 nJ per pulse, PRF 75 MHz.
YLohia  (posted 2018-10-04 09:53:09.0)
Hello, thank you for contacting Thorlabs. While we have not yet obtained conclusive damage threshold test data on these mirrors yet, we do expect it to be on the order of 0.06 to 0.10 J/cm^2 at that wavelength.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
UM05-45G Support Documentation
UM05-45GØ1/2" Low GDD Ultrafast Mirror, 460 - 590 nm, 45° AOI
$169.61
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UM10-45G Support Documentation
UM10-45GØ1" Low GDD Ultrafast Mirror, 460 - 590 nm, 45° AOI
$248.68
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