These mirrors are part of the Femtosecond Optimized optics series, Newport's premier optics product line, and reflect over 99% from 600 to 1,000 nm or over 97% from 470 to 1,000 nm. They offer near-zero Group Delay Dispersion (GDD) over the extended bandwidths. They are an inexpensive option for ensuring that ultrashort optical pulses maintain peak power and do not suffer broadening effects associated with standard metallic or dielectric mirrors.
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10B20EAG.1 Silver Mirror, fs Optimized, 0-45° AOI, 25.4 mm, 600-1000 nm |
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$215 |
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Silver Mirror Pack, fs Optimized, 0-45° AOI, 25.4 mm, 600-1000 nm, Qty 10
$1,935
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10B20EAG.1-PK Silver Mirror Pack, fs Optimized, 0-45° AOI, 25.4 mm, 600-1000 nm, Qty 10 |
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$1,935 |
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10B20EAG.2 Silver Mirror, Femtosecond Optimized, 0-45° AOI, 25.4 mm, 470-1000 nm |
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$215 |
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Silver Mirror Pack, fs Optimized, 0-45° AOI, 25.4 mm, 470-1000 nm, Qty 10
$1,937
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10B20EAG.2-PK Silver Mirror Pack, fs Optimized, 0-45° AOI, 25.4 mm, 470-1000 nm, Qty 10 |
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$1,937 |
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20B20EAG.1 Silver Mirror, Femtosec Optimized, 0-45° AOI, 50.8 mm, 600-1000 nm | $421 |
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| Wavelength Range | 600-1000 nm | 470-1000 nm | 600-1000 nm | |
| Angle of Incidence | 0-45° | 0-45° | 0-45° | |
| Coating Type | Broadband special coating for ultrafast pulses | Broadband special coating for ultrafast pulses | Broadband special coating for ultrafast pulses | |
| Reflectivity | R> 99% @ 600-1000 nm, 0° AOIRS>99% @ 540-1000 nm, RP>98.5% @ 580-1000 nm, 45° AOI | R> 97% @ 470-1000 nm, 0° AOIRS>96% @ 430-1000 nm, RS>98% @ 460-890 nm, RP>96% @ 480-1100 nm, 45° AOI | R> 99% @ 600-1000 nm, 0° AOIRS>99% @ 540-1000 nm, RP>98.5% @ 580-1000 nm, 45° AOI | |
| Material | N-BK7 | N-BK7 | N-BK7 | |
| Mirror Shape | Round | Round | Round | |
| Surface Quality | 10-5 scratch-dig | 10-5 scratch-dig | 10-5 scratch-dig | |
| Surface Flatness | λ/10 at 632.8 nm | λ/10 at 632.8 nm | λ/10 at 632.8 nm | |
| Back Surface | Commercial Polished | Fine Grind | Fine Grind | |
| Thickness | 6.35 mm | 6.35 mm | 10 mm | |
| Thickness Tolerance | ±0.1 mm | ±0.1 mm | ±0.1 mm | |
| Diameter | 25.4 mm | 25.4 mm | 50.8 mm | |
| Diameter Tolerance | +0/-0.1 mm | +0/-0.1 mm | +0/-0.1 mm | |
| Wedge | < 5 arc min | < 5 arc min | < 5 arc min | |
| Chamfers | 300 ± 200 µm | 300 ± 200 µm | 300 ± 200 µm | |
| Chamfers Angle Tolerance | 45 ±15° | 45 ±15° | 45 ±15° | |
| Cleaning | Non-abrasive method, methanol or isopropyl alcohol on lens tissue recommended | Non-abrasive method, methanol or isopropyl alcohol on lens tissue recommended | Non-abrasive method, methanol or isopropyl alcohol on lens tissue recommended |
When the bandwidth of low dispersion dielectric coatings becomes insufficient, these mirrors are the ideal choice. With a special reflectance-enhancing dielectric multi-layer overcoating, these enhanced silver mirrors provide very high reflectance for 0° to 45° AOI for s- and p-polarization and an absolute GDD value less than 5 fs2 over bandwidths spanning approximately one optical octave. The EAG.1 coating is optimized for the fluorescence range of Ti:Sapphire, and the EAG.2 coating is matched to the spectra of typical hollow fiber compressors and certain parametric sources.
Ideal for use with ultrashort pulse lasers, EAG.1 coated high reflectance beamsteering mirror gives R>99% 600-1000 nm at 0 deg AOI, Rp>98.5% 580-1000 nm and Rs>99% 540-1000 nm at 45 deg AOI.
Careful thin film coating design and advanced coating processes result in minimum effect on pulse dispersion. The absolute value of GDD is an astounding less than 5 fs2 from 550 to 1050 nm.
 Ideal for use with ultrashort pulse lasers, EAG.2 coated high reflectance beamsteering mirror gives R>97% 470-1000 nm at 0 deg AOI, Rp>96% 480-1100 nm and Rs>98% 460-890 nm (Rs>96% 430-1000 nm) at 45 deg AOI.
Careful thin film coating design and advanced coating processes result in minimum effect on pulse dispersion. The absolute value of GDD is an astounding less than 5 fs2 from 450 to 1100 nm.
N-BK7 is a relatively hard Borosilicate glass that offers good scratch resistance with a very low level of inclusions. For more information, refer to the optical material technical note.
Recently a white paper was published on OSA's Optics Express detailing laser induced damage on the FemtoOptics Silver Mirrors. Please click here to view details: Few-cycle pulse laser induced damage threshold of ultra-broadband optics.
The EAG.1 coating specifically can withstand 0.19 J/cm2 measured with 5fs pulses, single shot in vacuum. Or, 0.12 J/cm2, measured with 5fs pulses at 500 Hz (1000 shots in vacuum). Data c/o Prof. Enam Chowdhury, Ohio State University
FemtoOptics™ is the premier optics product line specifically optimized for femtosecond pulse manipulation. Consisting of innovative, high-quality, easy-to-use, cutting-edge optical components and assemblies, we have exceptional support and service for industrial and research applications across the world. See cross-reference information to the right.
| Newport Part | FemtoOptics Part |
| 10B20EAG.1 | OA022 |
| 10B20EAG.2 | OA093 |
| 20B20EAG.1 | OA248 |
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