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Options for the "NIR" Optical bench

Detectors

In the "NIR" Spectrometers, we offer three different InGaAs linear array detectors, one 512-element array and two 256-element arrays. The Hamamatsu detectors used in the "NIR" Optical Bench are InGaAs photodiode linear arrays with each pixel connected to a charge amplifier array consists of CMOS transistors. These detectors deliver high sensitivity and stable operation in the near infrared.

The detectors all include onboard thermoelectric cooling. A thermistor monitors the array's temperature and a thermoelectric device can cool

the arrays to 30 °C below ambient, keeping the array stable to within ±0.1 °C. In addition, you can set and monitor the detector's temperature via software.

Spectral Response Curves

NIR-512 NIR256-2.1

1.4

NIR256-2.5

1.2

5 3

1.0 0.8 0.6 0.40.2

> z

D r a.

^¿00 1500 ¿00 2500 3000

WAVELENGTH (nm)

500

Te^^az t^f r ^three ^NIR

Fixed Entrance Slits

An option available with user-configured "NIR" spectrometers is selecting the size of the entrance aperture. Entrance slits are rectangular apertures, 1-mm tall and various widths from 10 /vm to

A slit is installed on the inside edge of the bulkhead of an SMA 905 Connector.

200 jUm, with the width determining the UIIIUUIII ui nyui OI lid II I

in place; it only can be changed by our technicians. You can opt against having a slit,

slit is fixed

in which case

(D P (D

E o

C-

0 (D

a CD

the diameter of the fiber connected to the spectrometer determines the size of the entrance aperture.


Slit	Description	NIR-512 Pixel Resolution	NIR256-2.1 Pixel Resolution	NIR256-2.5 Pixel Resolution	Price
SLIT-10	10-Lim wide x 1-mm high	~2.4 pixels	~1.2	~1.2	$150
SLIT-25	25-Lim wide x 1-mm high	~2.4 pixels	~1.2	~1.2	$150
SLIT-50	50-Lm wide x 1-mm high	~2.9 pixels	~1.5	~1.5	$150
SLIT-100	100-Lm wide x 1-mm high	~4.4 pixels	~2.2	~2.2	$150
SLIT-200	200-Lm wide x 1-mm high	~7.9 pixels	~4.0	~4.0	$150

Grating Selection Chart & Grating Efficiency Graphs

Here are the Grating Selection Chart and the Grating Efficiency Curves for the two gratings available with the "NIR" optical bench.


Grating Number	Intended Use	Groove Density	Spectral Range	Blaze Wavelength	Best Efficiency
N1	NIR-512 or NIR256-2.1	300	900 nm	1000 nm	700-2100 nm
N2	NIR256-2.1 or NIR256-2.5	150	1600 nm	1600 nm	700-2500 nm

N1 Grating Efficiency

N2 Grating Efficiency

100%-

80%-

80%

u z

u. u.

u z

u. u.

60%

40%-

20%

77"

7,00 1300^

WAVELENGTH (nm)

"7507

700 1100 1300 157 1700 i77

WAVELENGTH (nm)

700

For all your sensing needs, visit OceanOptics.com