ASP-150. Multipurpose Spectrometer

The ASP-150 unit with longer focal length is designed for a wide variety of spectroscopy tasks. The ASP-150T model has a special tuning mechanism that allows making high-resolution measurements in a wide spectral range.
Optical specifications
Optical scheme Czerny-Turner
Spectral range for choosing the registration domain*, nm 190-1100 190-800 190-450 190-300
Grating(1), grooves/mm
200 300 400 600 1200 1800 1800
II order
III order
Registration domain width*(1), nm 950 640 480 315 145 90 40 25
Spectral resolution*, nm 0.6 0.42 0.3 0.2 0.09 0.06 0.025 0.017
Dispersion, nm/mm 33.2 22.4 16.8 11.0 5.1 3.1 1.4 0.9
Input slit 10 µm
Focal length 150 mm
Focal length of the camera objective 150 mm
Relative aperture 1:13
Input type(2) free-space and SMA905 fiber socket (FC socket or fiber patch-cord on request)
Synchronization external/internal
PC connection USB
Dimensions (LxWxH) 242х115х76 mm (ASP-150T); 205х115х76 mm (ASP-150C)
Weight 1.6 kg
CCD array specifications (any array can be combined with any grating type)
Model Toshiba 1205DG Toshiba 1304DG Hamamatsu
Number of pixels 2048 3648 1024
Pixel width 14 µm 8 µm 25 µm
Pixel height 200 µm 200 µm 500 µm
Minimum exposure time 4.2 ms 7.3 ms 2.1 ms
Maximum exposure time 4 s 5 s 5 s
Sensitivity(3), photons/count 80 20 650(3000)(4)
Antiblooming(5) yes no yes
Meansquare noise of reading, counts of ADC 5.4 3.5 16(4.4)(4
ADC 14 bit,
16384 counts
14 bit,
16384 counts
14 bit,
16384 counts
Dynamic range 1000:1 1000:1 1000:1 (4000:1)(4)
(1) - the necessary grating type, and hence the width and the central wavelength of the instantaneously registered range (aka registration window) inside the full possible range of the CCD detector should be specified when sending the request. The ASP-150C model has the chosen grating and its position fixed at factory, while the ASP-150T model has the possibility to adjust the position of the registration window via microscrew rotation, thus covering full possible range with the highest resolution;
(2) - each spectrometer is equipped with a fiber socket and allows measurement of either free-space or fiber signals without any realignment;
(3) - sensitivity given at the wavelength of 550 nm;
(4) - the Hamamatsu arrays provide for sensitivity control via special driving signal, that can set either low (values in brackets) or high sensitivity mode;
(5) - the property of the CCD to prevent the charge flow from the neighboring overexposed pixels;
* - values given for the Toshiba 1304DG CCD array.

The ASP-150C spectrometer is an ideal choice for a wide variety of different optical applications with its flexible tuning and high resolution. There is always a place for the ASP-150C on the optical table due to its small size, functionality and friendly interface.

The ASP-150T model is able to carry out measurements in a wider spectral range without any losses in resolution, owing to a special tunable mechanism.

All models have a special fiber input with a spectral slit, the size of which is conditioned with the detector. It allows measurement of either free-space or fiber signals without any realignment. However, it is not recommended to use fiber to measure spectrum of a femtosecond laser due to signal modulation and subsequent spectrum distortion.

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