1. Adjustable conversion gain from 10³ to 10¹¹ V/W

2. Operating range from fW to mW

3. Spectral range from 190 to 1700 nm

4. NEP down to 6 fW/√Hz

5. Bandwidth up to 500 kHz

6. Rise time down to 700 ns

7. Fiber optic or free space input

8. Calibration for all fiber optic models

9. Manual and remote control

The OE-200 series of variable gain photoreceivers is designed for a great variety of applications requiring the fast and precise measurement of small optical signals. By combining a low noise transimpedance amplifier with a silicon or InGaAs photodiode a broad wavelength range from 190 nm up to 1700 nm is covered. The integrated amplifier offers adjustable gain from 10³ to 10¹¹ V/W and thus allows the measurement over a wide dynamic range from ca. 100 fW up to 2 mW optical input power. Its high sensitivity is achieved by a low noise design resulting in a noise equivalent power (NEP) of minimum 6 fW/√Hz. Many additional features like switchable signal filters, an offset adjustment and the capability of manual and opto-isolated remote control by a PC make the OE-200 the most versatile photoreceiver in its class.

In addition to its high sensitivity the OE-200 also offers a fast signal response. With its maximum bandwidth of 500 kHz it is ideally suited for time resolved measurements with a signal rise time down to 700 ns. Industrial process control, automated measurement systems and fast opto electronic control loops are just a few of the many applications that can profit from a fast optical front-end realized by the OE-200.

The high precision and low drift of the OE-200 ensure repeatable and consistent measurements also in the highest gain setting. All models with fiber optic input come with an optical calibration for reliable and accurate results. Thus the OE-200 can be also used as precise and fast power meter with a high bandwidth of up to 500 kHz and a wide dynamic range of up to 100 dB.

The free space input is designed as a 1.035"-40 threaded flange with a screw-on coupler ring (FST) or as a 25 mm round flange without thread (FS). Both types open up broad compatibility with optical accessories from various manufacturers, such as lenses, tubes, cage systems, optical adapters etc.

The FST free-space input can be converted into fiber connections (FC, FSMA) easily by simply screwing on the fiber adapter of the PRA series.

The relatively large-area detector facilitates optical focusing in free-space applications and ensures a high and stable degree of coupling when using the optionally available fiber optic adapter. For models with detector areas smaller than ? 0.4 mm, the use of fiber adapters is only recommended to a limited extent, since coupling losses and instabilities can occur. If the focus is on high-precision fiber optic measurements, using FC-models with fixed optical fiber input will usually give the best results.

Pic. 1: FST input flange with 1.035"-40 external thread and coupler ring with internal thread；Pic. 2: FS input with 25 mm round flange；Pic. 3: FC input with permanent/fixed PC/APC coupling.

All OE-200 photo receivers are equipped with UNC 8-32 and M4 threaded holes and can therefore be conveniently and stably integrated into optical systems on standard rod holders. The optionally available adapter plate PRA-PAP opens up further mounting options.

The Following Characteristics Are Valid For All Models:

Offset adjustable by trimpot or external control voltage. LED overload indication. Output short-circuit protected. Power supply via 3-pin Lemo® socket. A mating connector is provided with the device. Optional power supply PS-15 available. For further information please view the datasheet or contact FEMTO.