UV optics
Investigation of the rapidly-evolving dynamics of photo active biological and chemical systems via exploitation of time-resolved spectroscopy requires few-cycle pulses with central wavelengths in the range from near ultraviolet (UV) to vacuum UV (VUV). Despite the great efforts over the last decade, the generation of high-energy few-fs UV pulses remains non-trivial. A well-known alternative approach to generate few-fs pulses is nonlinear compression by means of dispersive dielectric multilayer mirrors. The concept has been successfully explored in the VIS and NIR spectral regions, has been expanded to the VUV and extreme UV (EUV) and is now approaching the range of near UV.
220nm – 400nm
* GDD (fs2) = Group Delay Dispersion* CW (nm) = Central Wavelength* AOI = Angle of normal Incidence in degrees* Pol = Polarization
Name
Min (nm)
Max (nm)
CW (nm)
Reflectivity (%)
GDD (fs2)
AOI (°)
Pol
Comments
240
260
250
90
-
0
p
High-reflective mirror
230
270
250
80
-70
8
s
High-dispersive mirror
255
265
260
90
-50
5
p,s
Dispersive mirror
HR257
235
285
260
99
0
45
s
UV high-reflector
250
275
262
98
0
0
p
High-reflective mirror
255
277
263
80
-145
5
p
High-dispersive mirror
258
270
264
99.95
0
0
p
High-reflective mirror
255
275
265
98
0
45
s
Dichroic mirror
250
280
265
49
-20
45
p
Beam splitter
258
274
266
95
-
56
s
Thin-film polarizer
270
273
271
98
-60
7
p
High-dispersive mirror
268
278
273
80
-116
5
p,s
Dispersive mirror
290
310
300
97
-
75
p
Beam splitter
250
360
305
98
0
5
p
Broad-band high-reflective mirror
240
370
305
95
0
5
p
Broad-band dichroic mirror
320
375
347.5
99.9
-50
5
p
High-dispersive mirror
300
430
365
90
-
0
p
Beam splitter
350
450
400
99
-50
5
p
Broad-band dispersive mirror
HR257
Details Description of the design
UV high-reflector
Type
Mirror
Subtype
HR (high-reflection) mirror
Nominal GDD
0 fs2
First working range
Angle of Incidence in degrees
45 °
Angle of Incidence in degrees (double-angle)
-
Polarization regime (primary spectral range)
s
Spectral category
UV
Spectral working range low end
235 nm
Spectral working range high end
285 nm
Central wavelength
260 nm
Minimum reflectance
99 %
Maximum reflectance
-
Minimum transmission
-
Second working range
Second spectral working range low end
245 nm
Second spectral working range high end
270 nm
Polarization regime (second working range)
s
Minimum reflectance
99 %
Minimum transmittance
-
商品属性 [波长] 260nm [反射率] 99% [偏振] s