Single-Wavelength Detectors

Electrical Bandwidth

Up to 10 GHz

Minimum Detection Power

10E-15 - 1E-9 W

Center Wavelength

2.2 - 5.0 µm

Optical Input

SMA fiber connector or free space

Optical Bandwidth

15 - 200 nm

Tuning

Optional

Tag: SPECTRO: IR Brand: nlir

Single-Wavelength Detectors: Mid-Infrared Detection at 10 GHz!

Using narrowband and upconversion technology together with low-noise silicon-based detectors, the single-wavelength detector from NLIR achieves detection at 10 GHz with low-noise and high efficiency.

Inside of the NLIR plug-n-play detector module, the infrared signal mixes with the high-power pump to produce a near-visible signal. This signal is then picked up by a versatile range of high response silicon-based detectors.

In case you are not in the need for ultra-low signal detection, we also offer broad-band solutions. Broad-band solutions do compromise the efficiency but allow detection of broadband sources at ultrahigh-speeds and low-noise.

Whether you are looking for the smallest or the fastest signals we believe that our portfolio of state-of-the-art mid-IR detectors can serve almost any challenging measurement task you can imagine.

Always plug-n-play and maintenance free!

General Spec
Edition	D2250-DC	D2250-2M	D2250-100M	D2250-240M	D2250-1G	D2250-10G
Center Wavelength	2.2-5.0 µm	2.2-5.0 µm	2.2-5.0 µm	2.2-5.0 µm	2.2-5.0 µm	2.2-5.0 µm
Optical Bandwidth (1), (2)	15-200 nm	15-200 nm	15-200 nm	15-200 nm	15-200 nm	15-200 nm
Electrical Bandwidth, 3 dB	DC - 20 Hz	DC - 2E6 Hz	10E3 - 100E6 Hz	10E3 - 240E6 Hz	10E3 - 1E9 Hz	20E3 - 10E9 Hz
Noise-Equivalent Power	10E-15 W/Hz	3E-13 W/Hz	0.5E-12 W/Hz	0.5E-12 W/Hz	2E-12 W/Hz	1E-9 W/Hz
Minimum Detection Power (3)	45E-15 W	4E-10 W	5E-9 W	8E-9 W	6E-8 W	100E-6 W
AC Responsivity (4)	NA	20E6 V/W	600E3 V/W	300E3 V/W	3E3 V/W	120 V/W
DC Responsivity (4)	200E9 V/W	20E6 V/W	NA	NA	NA	50 V/W
Dark Noise (std)	9 mV	3.5 mV	6 mV	4 mV	TBD	TBD
Output Voltage, limit (50 ohm)	10 V	4.7 V	1.5 V	1.5 V	1 V	0.45 V
Rise Time (10-90%)	NA	170 ns	3.4 ns	1.41 ns	0.34 ns	0.034 ns
Optical Input (5)	SMA Fiber Port	SMA Fiber Port	SMA Fiber Port	SMA Fiber Port	SMA Fiber Port	SMA Fiber Port
Polarization Direction	Vertical	Vertical	Vertical	Vertical	Vertical	Vertical
Optimal Input Beam Size	0.5 (Customizable) mm	0.5 (Customizable) mm	0.5 (Customizable) mm	0.5 (Customizable) mm	0.5 (Customizable) mm	0.5 (Customizable) mm
Maximum Operating Temperature	30 °C	30 °C	30 °C	30 °C	30 °C	30 °C
Physical Dimensions (H x L x W)	100 x 306 x 200 mm(3)	100 x 306 x 200 mm(3)	100 x 306 x 200 mm(3)	100 x 306 x 200 mm(3)	100 x 306 x 200 mm(3)	100 x 306 x 200 mm(3)
Weight	5 kg	5 kg	5 kg	5 kg	5 kg	5 kg
Mounting	4 x 1" posts	4 x 1" posts	4 x 1" posts	4 x 1" posts	4 x 1" posts	4 x 1" posts

Footnotes:
1) The minimum bandwidth depends on the center wavelength; higher center wavelengths implies higher minimum bandwidth (at 4.2 µm the bandwidth is 200 nm).
2) Broadband options are available upon request; broader bandwidth typically reduces the response.
3) Minimum power in full electrical bandwidth.
4) Specifically valid for smallest optical bandwidth at center of wavelength is 3.5 µm.
5) Optimized for 200 µm diameter fiber with NA 0.26.

Pulse characterization
Fast-event analysis
Ultra-low-level signal extraction
Free-space optical communication
Remote sensing
QCL and OPO beam analysis

Measurement of mid-IR ns Pulses

Light from an NKT Photonics MIR Compact supercontinuum source, which emits 5 ns pulses at 40 kHz covering a spectrum from 2 µm to 4.2 µm, is measured using two different point detectors. A MIR monochromator selects the wavelength 2.4 µm with a 20 nm bandwidth, and the output is coupled to a 200 µm MIR fiber. The output of the fiber is sent in turn to each of two detectors: an NLIR 240 MHz 2.4 µm Single-wavelength detector (with 50 dB attenuation) and a commercially available 9 MHz InAsSb detector with direct exposure. The figure shows the responses of the two detectors.