Low GDD Ultrafast Mirrors for 355 - 445 nm


  • Ideal for Second Harmonic of Femtosecond Ti:Sapphire Lasers
  • Designed for 355 - 445 nm
  • Group Delay Dispersion < 30 fs2

UM05-45U

(Ø1/2")

UM10-45U

(Ø1")

Application Idea

UM05-45U Low GDD Mirror in a
POLARIS-K05 Mirror Mount

Related Items


Please Wait
Item # UM05-45U UM10-45U
Design Wavelength Range 355 - 445 nm
Diameter 1/2" (12.7 mm) 1" (25.4 mm)
Diameter Tolerance +0.00 mm / -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% (355 - 445 nm)
Rp > 99% (370 - 425 nm)
Angle of Incidence 45°
Group Delay Dispersion |GDDs| < 30 fs² (355 - 445 nm)
|GDDp| < 30 fs² (370 - 425 nm)
Laser Induced
Damage Thresholda		 0.081 J/cm2 (400 nm, 55 fs FWHM, S-Pol, 1 Pulse)
0.062 J/cm2 (400 nm, 55 fs FWHM, S-Pol, 10000 Pulses)
Substrate Fused Silica
Front Surface Flatness λ/10 at 632.8 nm Over Clear Aperture
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. See the Graphs tab for a plot of LIDT as a function of the number of incident pulses.

Features

  • Designed for Frequency-Doubled Ultrafast Ti:Sapphire Laser Pulses
  • Ideal for Laser Pulses Shorter than 250 fs
  • Reflectance Greater than 99%
  • Low Group Delay Dispersion: |GDD| < 30 fs2
  • Available in Ø1/2" and Ø1" Sizes
  • For Use at a 45° Incident Angle

These Low Group Delay Dispersion (GDD) Mirrors provide high reflectance and low group delay dispersion in the 355 - 455 nm range (see the table to the right and the Graphs tab for details). This wavelength range is centered about 400 nm, making the mirrors ideal for the second harmonic of femtosecond Ti:Sapphire lasers. Designed for use at a 45° angle of incidence, their low GDD of <|30 fs2| helps prevent broadening of the incident pulse.

The ultrafast mirrors are available in 1/2" and 1" diameters. The edge of each optic is engraved with the item number and an arrowhead pointing to the coated surface, as shown in the photos above. Please note that the fundamental of the Ti:Sapphire laser will leak through the mirror substrate; the back surface of these mirrors is polished so that an appropriate beam trap, such as the BT610 (BT610/M) Beam Trap, can be used to absorb this through beam. If you wish to keep the fundamental in the beam path, please consider our dual-band ultrafast mirror.

In addition to these mirrors for 355 - 445 nm, Thorlabs offers low GDD mirrors for various other wavelength ranges. For our full selection of optics for ultrafast applications, please see the Ultrafast Optics tab.

The plots below give the theoretically calculated reflectance and group delay dispersion (GDD) of these mirrors at a 45° AOI and represent the designed performance. The actual performance will vary from lot to lot within the specifications given in the Overview tab.

Reflectance Plot
Click to Enlarge
Click for Raw Data for 300 - 1000 nm
The shaded region in this plot denotes the wavelength range over which we guarantee Rs > 99%.
GDD Plot
Click to Enlarge
Click for Raw Data for 300 - 1000 nm
The shaded region in this plot denotes the wavelength range over which we guarantee <|30 fs2| GDD for s-polarized light. The GDD fluctuates rapidly outside of this wavelength range.
LIDT Plot
Click to Enlarge
The laser induced damage threshold (LIDT) value of an ultrafast optic is defined as the fluence (per pulse) that produces visible damage after a given number of pulses. These LIDT values were measured with 55 fs FWHM pulses at 400 nm that were s-polarized and incident at 45°.

Posted Comments:
No Comments Posted

Thorlabs offers a wide selection of optics optimized for use with femtosecond and picosecond laser pulses. Please see below for more information.

Low GDD Mirrors
Low-GDD Mirrors, 355 - 445 nm Low-GDD Mirrors, 460 - 590 nm Low-GDD Mirrors, 700 - 930 nm Low-GDD Mirrors, 950 - 1170 nm Low-GDD Mirrors, 1400 - 1700 nm Low-GDD Mirrors, 1780 - 2250 nm
355 - 445 nm 460 - 590 nm 700 - 930 nm 950 - 1170 nm 1400 - 1700 nm 1760 - 2250 nm
Metallic Mirrors Dielectric Mirror High-Power Mirrors for
Picosecond Lasers
Dispersion-Enhanced Silver Mirrors Protected Silver Mirrors Dual-Band Dielectric Mirror, 400 nm and 800 nm Picosecond Yb Laser Mirrors
Ultrafast-Enhanced
Silver Mirrors,
750 - 1000 nm		 Protected Silver Mirrors,
450 nm - 20 µm		 Unprotected Gold Mirrors,
800 nm - 20 µm		 Dual-Band
Dielectric Mirror,
400 nm and 800 nm		 Ytterbium Laser Line Mirrors,
250 nm - 1080 nm
Dispersion-Compensating Optics Low-GDD Harmonic
Beamsplitters		 Deterministic GDD
Beamsplitters
Dispersion-Compensating Mirrors Dispersion-Compensating Prism Pairs Beamsplitter and Window Pair
Dispersion-Compensating
Mirrors, 650 - 1050 nm		 Dispersion-Compensating
Prisms, 700 - 900 nm		 Harmonic Beamsplitters,
400 nm and 800 nm or
500 nm and 1000 nm		 Beamsplitters & Windows,
600 - 1500 nm or
1000 - 2000 nm
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
UM05-45U Support Documentation
UM05-45UØ1/2" Low GDD Ultrafast Mirror, 355 - 445 nm, 45° AOI
$133.10
Today
UM10-45U Support Documentation
UM10-45UØ1" Low GDD Ultrafast Mirror, 355 - 445 nm, 45° AOI
$199.11
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

  • High-Power Mirrors for Picosecond Ytterbium Lasers

  • Ultrafast-Enhanced Silver Mirrors, 750 - 1000 nm

  • Chirped Mirrors

  • Low-GDD Dielectric Mirror, 400 and 800 nm

  • Protected Silver Mirrors