Product Info.

O/E Converter

*O/E Converter : SPA-4
(Max Core = 0.25mm, Max NA = 0.5, 300V/W@850nm, DC to 3GHz)

* Suitable for multiple wavelength
* A silicon PIN Photodiode of which frequency characteristics does not depend on wavelength
* Maximum NA: 0.5
* Wide range of receivable wavelength: 380nm to 950nm
* Wide range of Convertible Frequency Bandwidth: DC to 3.0GHz
* Sensitivity : 300V/W
* Low output offset voltage: 0.5mV or less
* Compact: 103mm x 44mm x 21mm
* Lightweight: 130g
* Equips a silicon PIN Photodiode configured with unique lens system
* Reasonable price:JPY 410,000 for direct sales
 (Excluded tax and shipping cost)

[1] Specifications
[2] Lens system
[3] Spectral Sensitivity (by calculation)
[4] Step Response and Frequency Characteristics (Example)
[5] Responding characteristics of the PD in a range of convertible frequency bandwidth
[6] options

[2] Lens System


Maximum Acceptable Diameter = 0.25mm
Maximum Acceptable NA = 0.5
Diameter of PD = 0.2mm
Optical Magnification = 0.8

[3] Spectral Sensitivity (by calculation)


Reference wavelength: 850nm

Maximum sensitivity: at 700nm

Sensitivities vs wavelength

Sensitivity Wavelength
158 V/W 400nm
263 V/W 500nm
391 V/W 600nm
463 V/W 700nm
383 V/W 800nm
205 V/W 900nm

[4] Step Response and Frequency Characteristics (Example)


Step Response of SPA-4
Rise time: 143ps, Overshoot : 7.76%
Frequency Characteristics of SPA-4
-3dB (Electrical) Frequency : Approx. 3.0GHz

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