Astigmatic Multipass Absorption Cells

Light-weight Astigmatic Multipass Absorption Cell – AMAC-36LW

A new lightweight (1.25 kg) 36 meter (0.3 liter volume) Astigmatic Multipass Absorption Cell, the AMAC-36LW uses the same high-efficiency multipass optical design as our AMAC-36, but with less than half the mass. A similar lightweight cell is also available with 76 meter path length, 0.5 liter volume, the AMAC-76LW.

Specifications

AMAC-36AMAC-76
Path length36 (18) m76 (55)
Base path0.20 m0.32 m
Number of passes182 (90)238 (174)
Volume0.3 liters0.5 liters
Mirror diameter3.8 cm3.8 cm
Optical axis height6.4 cm6.4 cm
In-out half-angle5.1 degrees3.2 degrees
Input hole diameter4.3 mm4.3 mm
Dimensions exterior
Length
Width
Weight
30 cm
7.6 cm
4.1 kg
42 cm
7.6 cm
4.4 kg
Optical DesignAstigmatic two-mirror system with central coupling hole.
MirrorsNickel plated aluminum with broad-band dielectric coating.
Wavelength range3 to 11 µm (actual range may be broader).
Reflectivity99.2 %
Window materialBaF2
Body materialsNickel plated aluminum, stainless steel end flanges, Pyrex tube.

References

Dual quantum cascade laser trace gas instrument with astigmatic Herriott cell at high pass number, J. B. McManus, M S. Zahniser, D. D. Nelson, Appl. Opt., 50, A74-A85, 2011.

Application of quantum cascade lasers to high-precision atmospheric trace gas measurements, J. B. McManus, M. S. Zahniser, D. D. Nelson, Jr., J. H. Shorter, S. Herndon, E. Wood, R. Wehr, Opt. Eng. 49, 111124, 2010.

Paraxial Matrix Description of Astigmatic and Cylindrical Mirror Resonators with Twisted Axes for Laser Spectroscopy, B. McManus,  App. Optics, 46, 472-482, (2007).

Astigmatic mirror multipass absorption cells for long-path-length spectroscopy, J.B. McManus, P.L. Kebabian, and M.S. Zahniser, Applied Optics, 34, 3336-3348 (1995).

Light-weight Astigmatic Multipass Absorption Cell – AMAC-36LW

A new lightweight (1.25 kg) 36 meter (0.3 liter volume) Astigmatic Multipass Absorption Cell, the AMAC-36LW uses the same high-efficiency multipass optical design as our AMAC-36, but with less than half the mass. A similar lightweight cell is also available with 76 meter path length, 0.5 liter volume, the AMAC-76LW.

Specifications

AMAC-36AMAC-76
Path length36 (18) m76 (55)
Base path0.20 m0.32 m
Number of passes182 (90)238 (174)
Volume0.3 liters0.5 liters
Mirror diameter3.8 cm3.8 cm
Optical axis height6.4 cm6.4 cm
In-out half-angle5.1 degrees3.2 degrees
Input hole diameter4.3 mm4.3 mm
Dimensions exterior
Length
Width
Weight
30 cm
7.6 cm
4.1 kg
42 cm
7.6 cm
4.4 kg
Optical DesignAstigmatic two-mirror system with central coupling hole.
MirrorsNickel plated aluminum with broad-band dielectric coating.
Wavelength range3 to 11 µm (actual range may be broader).
Reflectivity99.2 %
Window materialBaF2
Body materialsNickel plated aluminum, stainless steel end flanges, Pyrex tube.

References

Dual quantum cascade laser trace gas instrument with astigmatic Herriott cell at high pass number, J. B. McManus, M S. Zahniser, D. D. Nelson, Appl. Opt., 50, A74-A85, 2011.

Application of quantum cascade lasers to high-precision atmospheric trace gas measurements, J. B. McManus, M. S. Zahniser, D. D. Nelson, Jr., J. H. Shorter, S. Herndon, E. Wood, R. Wehr, Opt. Eng. 49, 111124, 2010.

Paraxial Matrix Description of Astigmatic and Cylindrical Mirror Resonators with Twisted Axes for Laser Spectroscopy, B. McManus,  App. Optics, 46, 472-482, (2007).

Astigmatic mirror multipass absorption cells for long-path-length spectroscopy, J.B. McManus, P.L. Kebabian, and M.S. Zahniser, Applied Optics, 34, 3336-3348 (1995).

Measurement of Trace Gas Fluxes Using Tunable Diode Laser Spectroscopy, M.S. Zahniser, D.D. Nelson, J.B. McManus and P.L. Kebabian. Phil. Trans. Roy. Soc. Lond. A., 351, 371-382 (1995).