The C5658 is a highly sensitive photodetector consisting of a Si APD (avalanche photodiode), a bias power supply and a low-noise amplifier, all integrated into a compact case. The APD used has an effective active area of φ0.5 mm to allow efficient coupling to a light beam in applications such as spatial light transmission. The APD internally multiplies the photocurrent to produce an ample gain (set to 100 times for C5658) and also features high-speed response, achieving detection limits up to 1 GHz wideband and -48 dBm (16 nWr.m.s.) noise level in combination with the low-noise amplifier. C5658 also incorporates a thermosensor and a temperature-compensated bias power supply necessary for stable operation of the APD. Highly sensitive optical measurements can be made just by supplying +12 V to C5658.
|Effective photosensitive area||φ0.5 mm|
|Temperature stability of gain (typ.)||±5.0 %|
|Photoelectric sensitivity (typ.)||2.50 × 105 V/W|
|Low Band Cut-off Frequency (typ.)||0.05 MHz|
|High Band Cut-off Frequency (typ.)||1000 MHz|
|Supply voltage (typ.)||12 V|
|Measurement condition||Photoelectric sensitivity: M=100, λ=800 nm, Temperature stability of gain: 25±10 ℃|
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