Low-GDD Ultrafast Mirrors for 970 - 1150 nm


  • Ideal for 1st Harmonic of Yb:Glass, Yb:YAG, and Nd:YAG Lasers
  • High Reflectance Over 990 - 1120 nm (0° AOI) or 970 - 1150 nm (45° AOI)
  • Group Delay Dispersion: |GDD| < 30 fs2

UM10-0B

(Ø1", 0° AOI)

UM05-0B

(Ø1/2", 0° AOI)

Application Idea

UM10-45B Low-GDD Mirror
in a POLARIS-K1 Mirror Mount

UM20-45B

(Ø2", 45° AOI)

Related Items


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Features

  • Low Group Delay Dispersion: |GDD| < 30 fs2
  • Ideal for Pulses Shorter than 250 fs
  • Reflectance Greater than 99%
  • Designed for 0° or 45° Angle of Incidence (AOI)
  • Sizes Available:
    • For 0° AOI: Ø1/2" or Ø1"
    • For 45° AOI: Ø1/2", Ø1", or Ø2"

Thorlabs' Low Group Delay Dispersion (GDD) Mirrors feature a coating designed for high reflectance in the near IR range. The wavelength range is optimized for Ytterbium (Yb) and Neodymium (Nd) lasers. These mirrors are ideal for applications where pulse broadening is a concern and are designed for a 0° (Item #s ending in -0B) or 45° (Item #s ending in -45B) angle of incidence (AOI). 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 |GDD| less than 30 fs2. For details, please see the Graphs tab.

Our low-GDD mirrors for 0° AOI are available with a 1/2" or 1" diameter and our low-GDD mirrors for 45° AOI are available with a 1/2", 1", or 2" diameter. The edge of each optic is engraved with the item number and an arrowhead pointing to the coated surface. The back surfaces of the 1/2" and 1" mirrors are 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 second harmonic of Ytterbium (Yb) and Neodymium (Nd) lasers, see our low-GDD ultrafast mirrors for 460 - 590 nm. For our full selection of optics for ultrafast applications, please see the Ultrafast Optics tab.

UMxx-0B, Low-GDD Mirrors for 990 - 1120 nm at 0° AOI

Reflectivity
Click to Enlarge
Click for Raw Data
This graph shows the theoretical reflectance as a function of wavelength. Since these mirrors are designed for normal incidence, the reflectance does not vary with polarization. The shaded region represents the specified wavelength range where the absolute reflectance is >99%. Please note that the reflectance outside of this specified region is typical and can vary from lot to lot, especially where the reflectance is fluctuating or sloped.
GDD
Click to Enlarge
Click for Raw Data
This graph shows theoretical results for the group delay dispersion (GDD). The shaded region represents the 990 nm - 1120 nm wavelength range for which GDD is specified. Since these mirrors are designed for normal incidence, the GDD does not vary with polarization.

 

UMxx-45B, Low-GDD Mirrors for 970 - 1150 nm at 45° AOI

Reflectivity
Click to Enlarge
Click for Raw Data
This graph shows the theoretical reflectance as a function of wavelength for both s- and p-polarizations. The shaded region represents the specified wavelength range where the absolute RS > 99%. Please note that the reflectance outside of this specified region is typical and can vary from lot to lot, especially where the reflectance is fluctuating or sloped.
GDD
Click to Enlarge
Click for Raw Data
This graph shows theoretical results for the group delay dispersion (GDD). The shaded region represents the 970 - 1150 nm wavelength range for which GDD is specified. The GDD values fluctuate rapidly outside of the specified wavelength range for s-polarized light..

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 Objectives
Harmonic Beamsplitters, 1064 nm, 532 nm, 355 nm, 266 nm High-Power Polarizing Beamsplitter Cubes, 1064 nm, 532 nm High Power Focusing Objectives, 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 High Power Focusing Objectives,
1064 nm, 532 nm
Lenses Filters
UVFS Plano-Convex Lenses, 1064 nm, 532 nm Air-Spaced Doublets, 1064 nm, 532 nm Laser Line Filters, 1064 nm Laser Line Filters, 532 nm
UVFS Plano-Convex Lenses:
532 nm/1064 nm: Unmounted or Mounted
532 nm: Unmounted
1064 nm: Unmounted		 Air-Spaced Doublets,
1064 nm, 532 nm		 Laser Line Filters, 1064 nm:
Standard or Premium		 Laser Line Filters, 532 nm:
Standard or Premium

Posted Comments:
Egor Manuylovich  (posted 2021-12-16 12:17:05.037)
Dear Thorlabs team, Could you provide me with the reflectance and GDD for AOI = 0°, please? Kind regards, Egor
YLohia  (posted 2021-12-23 01:11:03.0)
Hello, additional data for these mirrors can be requested by emailing techsupport@thorlabs.com. I have reached out to you directly with a theoretical estimate.
slm9  (posted 2014-08-22 11:24:18.123)
Dear Thorlabs-Team Do you have some specs for this coating if this mirror will be used under AOI 0°? I would like to know the spectral shift and the low GDD behavior @AOI 0°. Thanks and with best regards Markus
besembeson  (posted 2014-08-25 06:25:53.0)
Response from Bweh at Thorlabs USA: We have theoretical plots for the reflectivity and GDD when used at 0 deg in comparison to 45 deg. Our European office will followup with you by email regarding this.
strotherj  (posted 2014-03-26 15:43:56.47)
It would be nice to have mirror that would do 850nm to 1050nm, these are the wavelengths used for imaging fluorescent proteins. At present we use protected silver mirrors, and just accept that we lose most of our light in the mirrors.
besembeson  (posted 2014-03-27 04:51:45.0)
Response from Bweh E at Thorlabs: Thanks for contacting Thorlabs. We would look into your suggestion of having a low GDD mirror that will cover the 850nm to 1050nm range.

Low-GDD Ultrafast Mirrors, 990 - 1120 nm, 0° AOI

Item # UM05-0B UM10-0B
Design Wavelength Range 990 - 1120 nm
Diameter 1/2" (12.7 mm) 1" (25.4 mm)
Diameter Tolerance +0.00 / -0.10 mm
Clear Aperture >80% of Diameter
Thickness 6.4 mm (0.25") 9.5 mm (0.37")
Thickness Tolerance ±0.20 mm
Reflectance R > 99%
Angle of Incidence 0°
Group Delay Dispersion |GDD| < 30 fs²
Laser Induced Damage Thresholda 0.40 J/cm2 (1030 nm, 309 fs FWHM, S-Pol, 1000 Pulses)
Substrate Fused Silica
Front Surface Flatnessb λ/6
Front Surface Quality 15-5 Scratch-Dig
Parallelism ≤3 arcmin
Back Surface Polished
  • For ultrafast optics, the laser induced damage threshold (LIDT) is defined as the fluence (per pulse) that produces visible damage after a given number of pulses. LIDT values are not guaranteed in the ultrashort pulse regime. As such, they are provided as a service to customers.
  • At 632.8 nm Over Clear Aperture
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
UM05-0B Support Documentation
UM05-0BØ1/2" Low-GDD Ultrafast Mirror, 990 nm - 1120 nm, 0° AOI
$162.49
Today
UM10-0B Support Documentation
UM10-0BØ1" Low-GDD Ultrafast Mirror, 990 nm - 1120 nm, 0° AOI
$278.38
Today

Low-GDD Ultrafast Mirrors, 970 - 1150 nm, 45° AOI

Item # UM05-45B UM10-45B UM20-45B
Design Wavelength Range 970 - 1150 nm
Diameter 1/2" (12.7 mm) 1" (25.4 mm) 2" (50.8 mm)
Diameter Tolerance +0.00 / -0.10 mm
Clear Aperture >80% of Diameter
Thickness 6.4 mm (0.25") 9.5 mm (0.37") 12.0 mm (0.47")
Thickness Tolerance ±0.20 mm ±0.10 mm
Reflectance Rs > 99% (970 - 1150 nm)
Rp > 99% (1020 - 1080 nm)
Angle of Incidence 45°
Group Delay Dispersion |GDDs| < 30 fs² (970 - 1150 nm)
|GDDp| < 30 fs² (1020 - 1080 nm)
Laser Induced Damage Thresholda 0.40 J/cm2 (1030 nm, 309 fs FWHM, S-Pol, 1000 Pulses)
Substrate Fused Silica
Front Surface Flatnessb λ/4 λ/6 <λ/3
Front Surface Quality 15-5 Scratch-Dig 20-10 Scratch-Dig
Parallelism ≤3 arcmin ≤5 arcmin
Back Surface Polished Fine Ground
  • For ultrafast optics, the laser induced damage threshold (LIDT) is defined as the fluence (per pulse) that produces visible damage after a given number of pulses. LIDT values are not guaranteed in the ultrashort pulse regime. As such, they are provided as a service to customers.
  • At 632.8 nm Over Clear Aperture
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
UM05-45B Support Documentation
UM05-45BØ1/2" Low-GDD Ultrafast Mirror, 970 nm - 1150 nm, 45° AOI
$164.85
Today
UM10-45B Support Documentation
UM10-45BØ1" Low-GDD Ultrafast Mirror, 970 nm - 1150 nm, 45° AOI
$285.60
Today
UM20-45B Support Documentation
UM20-45BØ2" Low-GDD Ultrafast Mirror, 970 nm - 1150 nm, 45° AOI
$567.00
Today
Additional Ultrafast Mirrors for Pulsed Lasers
  • Low GDD Mirrors, 355 - 445 nm

  • Low GDD Mirrors, 460 - 590 nm

  • Low GDD Mirrors, 700 nm - 930 nm

  • Low GDD Mirrors, 970 nm - 1150 nm

  • Low GDD Mirrors, 1400 nm - 1700 nm

  • Low GDD Mirrors, 1760 nm - 2250 nm

  • Low-GDD Dielectric Mirror, 400 and 800 nm

  • High-Power Mirrors for Picosecond Ytterbium Lasers

  • Chirped Mirrors

  • Ultrafast-Enhanced Silver Mirrors, 750 - 1000 nm

  • Protected Silver Mirrors

  • Unprotected Gold Plano Mirrors

  • Complete Line of Ultrafast Optics