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Broadband Ultrafast Laser Optics (200 – 300 nm Bandwidth)

  • The coatings shown here are calculated for the wavelength range 700 – 1000 nm. Similar coatings are available for 600 – 900 nm and 650 – 950 nm.
  • Very high reflectance of the mirrors (R > 99.8 % … R > 99.95 % depending on the design)
  • Center wavelength, bandwidth, GD, GDD and TOD according to customer specifications
  • Spectral tolerance ±1 %
  • In-house design calculation and GDD measurement capabilities
  • GDD measurement reports are included in the delivery
LIDT Info
≈ 0.1 J/cm², 800 nm, 150 fs
Measurements were performed at Laser Zentrum Hannover

Mirror Pairs for AOI = 0°

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Fig.1:Reflectance and GDD spectra of a negative dispersion laser mirror pair
a)Reflectance vs. wavelength
b)GDD vs. wavelength
Mirror pairs show a very smooth average GDD spectrum, although the single broadband mirrors exhibit strong GDD oscillations. Pump mirror pairs, i.e. mirror pairs with at least one mirror showing high transmittance between 514 – 532 nm, are also available.

Turning Mirrors for s-polarized Light at AOI = 45°

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Fig.2:Reflectance and GDD spectra of a broadband turning mirror for s-polarized light
a)Reflectance vs. wavelength
b)GDD vs. wavelength

Turning Mirrors for p-polarized Light at AOI = 45°

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Fig.3:Reflectance and GDD spectra of a broadband turning mirror for p-polarized light
a)Reflectance vs. wavelength
b)GDD vs. wavelength

Output Couplers for AOI = 0°

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Fig.4:Reflectance and GDD spectra of several broadband output couplers
a)Reflectance spectra of several broadband output couplers
b)GDD spectra of the output coupler with R = 80 %; the GDD spectra are similar for all levels of reflectance
c)Reflectance spectrum of a broadband AR coating
AR (0°, 680 – 1030 nm) < 0.5 %

Beam Splitters for p-polarized Light at AOI = 45°

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Fig.5:Reflectance and GDD spectra of several broadband beam splitters for p-polarized light
a)Reflectance of several broadband beam splitters for p-polarization
b)GDD spectra for the 50 % beam splitter
c)Reflectance spectrum of a broadband AR coating for p-polarized light

Beam Splitters for s-polarized Light at AOI = 45°

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Fig.6:Reflectance and GDD spectra of several broadband beam splitters for s-polarized light
a)Reflectance of several broadband beam splitters for s-polarization
b)GDD spectra for the 50 % beam splitter
c)Reflectance spectrum of a broadband AR coating for s-polarized light

Negative Dispersion Pump Mirror Pairs for AOI = 0°

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Fig.7:Reflectance and GDD spectra of a negative dispersion pump mirror pair (mirror B without HT-option)
a)Reflectance vs. wavelength
b)GDD vs. wavelength

Thin Film Polarizers for AOI = 70°

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Fig.8:Reflectance and GDD spectra of a TFP (AOI = 70°), lower Rs to achieve “zero” GDD for Rs and Tp, bandwidth ≈ 300 nm
a)Reflectance vs. wavelength
b)GDD vs. wavelength
c)Rear side AR coating for s-polarized light. Please note that this coating results in R ≈ 15 % for the p-polarized component. As an AR coating for the p-polarization LAYERTEC suggests the use of the design from Fig. 8a.

High Negative Dispersion Mirror Pairs for AOI = 0°

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Fig.9:Reflectance, GD and GDD spectra of a high dispersion mirror pair with a bandwidth of 250 nm and an average GDD of -180 fs² ±40 fs² per bounce in the 800 nm range
a)Reflectance vs. wavelength
b)Calculated GD vs. wavelength
c)Measured GDD vs. wavelength

Mirror Pairs with Optimized Third Order Dispersion for AOI = 0°

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Fig.10:Reflectance, GDD and TOD spectra of a mirror pair optimized for broadband low third order dispersion
a)Reflectance vs. wavelength
b)GDD vs. wavelength
c)TOD vs. wavelength
The mirror pair shows very smooth GDD and TOD spectra, although the single mirrors exhibit considerable GDD and TOD oscillations.

Special Features

  • GDD of high dispersive mirrors between -50 fs² and -500 fs²
  • Very high reflectance
  • Center wavelength, bandwidth and GDD according to customer specifications
  • Please note that bandwidth and GDD are closely connected. High values of negative GDD result in a very narrow bandwidth
  • Spectral tolerance ±1 %
  • In-house design calculation and measurement capabilities (GDD 250 – 1700 nm, reflectance measurement by CRD 220 – 1800 nm)
LIDT Info
≈ 0.1 J/cm², 800 nm, 150 fs
Measurements were performed at Laser Zentrum Hannover
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LAYERTEC GmbH
Ernst-Abbe-Weg 1
99441 Mellingen
Germany

International Sales

+49 36453 744 0

contact@sales.layertec.de

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+1 707 48 10 216

ussales@layertec.de

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