1801-FS Free Space Optical Receiver

The 1801-FS Silicon Optical Receiver is a free space, 320 to 1000 nm photoreceiver offering a well-balanced combination of gain, bandwidth, and low noise over the DC to 125 MHz frequency range. Because of its high transimpedance gain and low noise-equivalent power (NEP), it offers the best in sensitivity for signals with rise and fall times as short as 3 ns. This high sensitivity, combined with its high-level output, reduces the effects of downstream noise sources. For mounting it has a 8-32 mounting thread, and we include an M4 metric adaptor and tool. An external ±15 VDC power supply, which must be purchased separately, is required. Power supply cables 0923 and 0924 are included with each detector.

Typical Responsivity of Model 1801 (Silicon)

High Transimpedance Gain and Low Noise

Because of their high transimpedance gain and low noise-equivalent power (NEP), they offer the best in sensitivity for signals with rise and fall times as short as 3 ns. This high sensitivity, combined with their high-level output, reduces the effects of downstream noise sources.

DC Coupled Versions

With true DC coupling, these photoreceivers give linear responses to transient signals without artificial ringing, tails, or other anomalies. For applications where you need to measure both the AC modulation and the DC component, choose the DC coupled receiver.

RF Shielding

Careful RF shielding and filtering of power-supply inputs eliminate electromagnetic interference, even in laboratories with Q-switched lasers and other noisy equipment.

Typical Frequency Response

Specifications

Technical Specs

Device Type

Photoreceiver (DC-Coupled)
Detector Diameter

0.4 mm
3 dB Bandwidth

DC to 125 MHz
Wavelength Range

320-1000 nm
Optical Input

Free Space
Detector Material

Silicon
Detector Type

PIN
Maximum Conversion Gain

2x10⁴ V/W
Maximum Transimpedance Gain

4x10⁴ V/A
Output Noise

5 mVrms
Rise Time

3 ns

Saturation Power

110 µW @ 800 nm
Maximum Pulse Power

10 mW
Peak Responsivity

0.5 A/W @ 800 nm
DC Bias Monitor Transimpedance Gain

10 V/mA
Output Connector

SMA
Output Impedance

33 Ω
Operating Temperature

10 - 35 °C, < 70% RH
Power Requirements

±15 VDC, <200 mA
Thread Type

8-32 (includes M4 adapter)

Device Type

Photoreceiver (DC-Coupled)
Detector Diameter

0.4 mm
3 dB Bandwidth

DC to 125 MHz
Wavelength Range

320-1000 nm
Optical Input

Free Space
Detector Material

Silicon
Detector Type

PIN
Maximum Conversion Gain

2x10⁴ V/W
Maximum Transimpedance Gain

4x10⁴ V/A
Output Noise

5 mVrms
Rise Time

3 ns

Saturation Power

110 µW @ 800 nm
Maximum Pulse Power

10 mW
Peak Responsivity

0.5 A/W @ 800 nm
DC Bias Monitor Transimpedance Gain

10 V/mA
Output Connector

SMA
Output Impedance

33 Ω
Operating Temperature

10 - 35 °C, < 70% RH
Power Requirements

±15 VDC, <200 mA
Thread Type

8-32 (includes M4 adapter)

Resources & Downloads

Related Products

Accessories (sold separately)

	Compare	Description	Compatibility	Drawings, CAD & Specs	Avail.	Price
		0901 Lab Power Supply, ±15 VDC	UNIVERSAL		In Stock	$568

Included Accessories

	Compare	Description	Compatibility	Drawings, CAD & Specs	Avail.	Price
		0923 Accessory Cable, Pico (m8) Double-Ended, Male to Male, 1 m	UNIVERSAL		In Stock	$59
		0924 Accessory Cable, Pico (m8) Male to Banana Plug, 1 m	UNIVERSAL		3 Weeks	$103

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Free Space Optical Receiver, 320-1000 nm Silicon, 125 MHz, DC-Coupled