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O-to-E Converters (Optical to Electrical)
Flexible, Affordable Lab Tool

Use these optical-to-electrical converters for measurements or experiments. Simply connect the device to the input terminal of your electronic measuring system and supply power. Features include high sensitivity, wide range, low noise and compact size.

 SPD-1 (320-1000 nm band 1200 MHz O-to-E Converter)
The SPD-1 series is an optical to electrical signal converter for measurements or experiments. You only have to connect the SPD-1 to the input terminal of your electronic measuring system.

Wavelength 320-1000 nm
Frequency Range DC to 1200 MHz
Sensitivity 500 mV/mW with 850 nm, 50 GI fiber
Peak sensivity wavelength 760 nm
Acceptable core diameter Less than 0.8 mm
Acceptable Fiber NA Less than 0.2
Wideband noise voltage Less than 1.3 mVrms up to 12.4 GHz
Noise equivalent power Less than -2.0 dBm @ 850 nm
Output offset voltage Within ± 0.5 mV
Output impedance 50 ohms
Input optical connector FC receptacle standard; SC and ST also available
Output coax connector BNC plug
Supply voltage ± 15V DC
Supply current +120 mA/-50 mA
Physical dimension 93 mm x 44 mm x 20 mm
Weight 110 g

 SPD-2 (380-1000 nm band 1200 MHz O-to-E Converter)
The SPD-2 will accept nearly 100% of the optical signal from 100 μm fiber with NA = 0.2. Simply connect the SPD-2 to the input terminal of an oscilloscope or a spectrum analyzer to observe the optical signal.

Wavelength 380-1000 nm
Frequency Range DC to 1200 MHz
Sensitivity 1000 mV/mW with 850 nm, 50 GI fiber
Peak sensivity wavelength 760 nm
Acceptable core diameter Less than 1.0 mm
Acceptable Fiber NA Less than 0.25
Wideband noise voltage Less than 1.9 mVrms up to 12.4 GHz
Noise equivalent power Less than -27.3 dBm @ 850 nm
Output offset voltage Within ± 0.5 mV
Output impedance 50 ohms
Input optical connector FC receptacle standard; SC and ST also available
Output coax connector BNC plug
Supply voltage ± 15V DC
Supply current +150 mA/-50 mA
Physical dimension 103 mm x 44 mm x 20 mm
Weight 130 g

 SPD-3 (380-950 nm band 2000 MHz O-to-E Converter)
The SPD-3, equipped with a photodiode, has a very flat frequency response curve with different wavelengths. This curve allows the SPD-3 to convert a wide frequency range of visible light into an electrical signal. The SPD-3 is ideal for use with an oscilloscope or a spectrum analyzer to observe the optical signal.

Wavelength 380-950 nm
Frequency Range DC to 2000 MHz
Sensitivity 500 mV/mW with 850 nm, 50 GI fiber
Peak sensivity wavelength 700 nm
Acceptable core diameter Less than 0.5 mm
Acceptable Fiber NA Less than 0.25
Wideband noise voltage Less than 1.5 mVrms up to 12.4 GHz
Noise equivalent power Less than -25.2 dBm @ 850 nm
Output offset voltage Within ± 0.5 mV
Output impedance 50 ohms
Input optical connector FC receptacle standard; SC and ST also available
Output coax connector BNC plug
Supply voltage ± 15V DC
Supply current +150 mA/-50 mA
Physical dimension 103 mm x 44 mm x 20 mm
Weight 130 g

 SPD-4 (380-950 nm band 3000 MHz O-to-E Converter)
The SPD-4, equipped with a photodiode, has a very flat frequency response curve with different wavelengths. This curve allows the SPD-3 to convert a wide frequency range of visible light into an electrical signal.

Wavelength 380-950 nm
Frequency Range DC to 3000 MHz
Sensitivity 300 mV/mW with 850 nm, 50 GI fiber
Peak sensivity wavelength 700 nm
Acceptable core diameter Less than 0.5 mm
Acceptable Fiber NA Less than 0.25
Wideband noise voltage Less than 1.7 mVrms up to 12.4 GHz
Noise equivalent power Less than -22.4 dBm @ 850 nm
Output offset voltage Within ± 0.5 mV
Output impedance 50 ohms
Input optical connector FC receptacle standard; SC and ST also available
Output coax connector BNC plug
Supply voltage ± 15V DC
Supply current +150 mA/-50 mA
Physical dimension 103 mm x 44 mm x 20 mm
Weight 130 g

 SPA-1 (400-1000 nm band 500 MHz O-to-E Converter)
The SPA-1 will accept nearly 100% of the optical signal (from 1000 μm fiber with NA = 0.5) and convert it into an electronic signal. Simply connect the SPA-1 to the input terminal of an oscilloscope or a spectrum analyzer to observe the optical signal.

Wavelength 400-1000 nm
Frequency Range DC to 500 MHz
Sensitivity 500 mV/mW with 850 nm, 50 GI fiber
Peak sensivity wavelength 800 nm
Acceptable core diameter 100 μm - 1.0 mm
Acceptable Fiber NA Less than 0.5
Wideband noise voltage Less than 0.8 mVrms up to 12.4 GHz
Noise equivalent power Less than -27.9 dBm @ 650 nm
Output offset voltage Within ± 0.5 mV
Output impedance 50 ohms
Input optical connector FC receptacle standard; F05, ST, and SMA also available
Output coax connector BNC plug
Supply voltage ± 15V DC
Supply current +150 mA/-50 mA
Physical dimension 103 mm x 44 mm x 20 mm
Weight 130 g

 LPD-1 (900-1650 nm band 1500 MHz O-to-E Converter)
The LPD-1 is an optical to electrical signal converter for measurements or experiments. Simply connect the LPD-1 to the input terminal of your electronic measuring system.

Wavelength 900-1650 nm
Frequency Range DC to 1500 MHz
Sensitivity 500 mV/mW with 1300 nm, 50 GI fiber
Peak sensivity wavelength 1550 nm
Acceptable core diameter Less than 0.08 mm
Acceptable Fiber NA Less than 0.2
Wideband noise voltage Less than 0.8 mVrms up to 12.4 GHz
Noise equivalent power Less than -27.9 dBm @ 1300 nm
Output offset voltage Within ± 0.5 mV
Output impedance 50 ohms
Input optical connector FC receptacle standard; SC and ST also available
Output coax connector BNC plug
Supply voltage ± 15V DC
Supply current +150 mA/-50 mA
Physical dimension 93 mm x 44 mm x 20 mm
Weight 110 g

 LPD-2 (950-1650 nm band 1500 MHz O-to-E Converter)
The LPD-2 is a long wavelength O-to-E converter which accepts large 500 μm core fiber with NA = 0.25. Connecting the LPD-2 to an oscilloscope or a spectrum analyzer is a cost-effective way to change electronic instruments into optical instruments.

Wavelength 950-1650 nm
Frequency Range DC to 1500 MHz
Sensitivity 1000 mV/mW with 1300 nm, 50 GI fiber
Peak sensivity wavelength 1550 nm
Acceptable core diameter Less than 0.5 mm
Acceptable Fiber NA Less than 0.25
Wideband noise voltage Less than 1.8 mVrms up to 12.4 GHz
Noise equivalent power Less than -29.2 dBm @ 1300 nm
Output offset voltage Within ± 0.5 mV
Output impedance 50 ohms
Input optical connector FC receptacle standard; SC and ST also available
Output coax connector BNC plug
Supply voltage ± 15V DC
Supply current +150 mA/-50 mA
Physical dimension 103 mm x 44 mm x 20 mm
Weight 130 g