SM1PD1B Datasheet | Thorlabs

Mounted Si Photodiode Descriptions The Thorlabs SM1PD1B photodiode is ideal for measuring both pulsed and CW fiber light sources, by converting the optical power to an electrical current. The detector is mounted in a convenient SM1 (Ø1.035”-40) externally threaded tube for easy mounting and integration in to existing set up. The detector also has internal RMS (Ø0.8”-36) threading for further mounting solutions. The photodiode is a Type B (Anode Grounded) arrangement and the pin codes for the specific package can be found in the drawing below. The photodiode anode produces a current, which is a function of the incident light power (P) and the wavelength (λ). The responsivity, ℜ (λ), can be read from the curve Responsivity Curve (provided below) to estimate the amount of photocurrent to expect. This current can be converted to a voltage by placing a load resistor (RL) from the photodiode anode to the circuit ground. The output voltage is derived as: ܸ௢ ൌ ܲ ൈ ℜሺλሻ ൈ ܴ௅ The bandwidth, f BW, and the rise time response, t R, are determined from the diode capacitance, CJ, and the load resistance, RL, as shown below. The diode capacitance can be lowered by placing a bias voltage from the photodiode cathode to the circuit ground. Ω Specifications ݂஻ௐ ൌ ଵ, ሺଶగሻோಽ஼಻ ‫ݐ‬ோ ൌ ଴.ଷହ ௙ಳೈ Specification Wavelength Range Peak Wavelength Responsivity Active Area Diameter Rise/Fall Time (RL=50 Ω, 20 V) NEP, Typical (440 nm, 20 V) Dark Current (5 V) Capacitance (5 V) Package Sensor Material Corresponding Unmounted Diode λ λP ℜ(λ) tr/tf W/√Hz Id Cj Value - 1100 nm 970 nm 0.65 A/W 94 mm2 40 ns 2.07 x 10-13 1.05 n A 432 p F SM1, External Thread RMS, Internal Thread Si FDS1010 Maximum Rating Max Bias (Reverse) Voltage Reverse Current Operating Temperature Storage Temperature 20 V 10 m A -10 to 60 °C -20 to 70 °C July 20, 2012 14001-S01, Rev B Remended Circuit Diagram Photo Detector Coaxial Cable Resistor 1kΩ 0.1µF Capacitor Load Resistor Responsivity...