Product Info.

O/E Converter

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

* Suitable for multiple wavelength
* Flat and stable frequency response up to high frequency range by equipping a silicon PIN Photodiode
of which frequency characteristics does not depend on wavelength
* Employ unique lens system
* Max. NA: 0.25, Max. core diameter: 0.5mm
* Wide range of receivable wavelength: 380nm to 950nm
* Wide range of convertible frequency Bandwidth: DC to 3.0GHz
* Sensitivity (Conversion Gain at Reference Wavelength): 300V/W
* Compact: 103mm x 44mm x 21mm
* Lightweight: 130g
* Equips a silicon PIN Photodiode configured with unique lens system
* Reasonable price:JPY 370,000 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 core diameter of POF: 0.5mm
Maximum NA: 0.25
Diameter of Photo Diode: 0.2mm
Optical Magnification: 0.4

[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)


Receivable Wavelength Range Reference Wavelength
Step Response of SPD-4
Rise time: 144ps, Overshoot : 12.4%
Frequency Characteristics of SPD-4
-3dB (Electrical) Frequency : Approx. 3.0GHz

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