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PD58 Series Large Photosensitive PD Photodetector

The PD58 series is a high-performance amplified photodetector module based on large-area silicon photodiode. It operates at 320-1100nm, supports bandwidth up to 20MHz, features free-space optical input with SM1 thread, and provides stable, low-noise optical signal detection.

Model：PD58

Tags： PD58 photodetector large area photodetector 320-1100nm detector free-space optical detector silicon photodiode 20MHz photodetector laser pulse detection optical sensing module

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Product Overview

The PD58 Series is a high-sensitivity amplified photodetector designed for free-space optical detection. It integrates a large 5.8x5.8mm silicon photodiode, a low-noise transimpedance amplifier, and a rugged aluminum package. With a wide spectral response of 320–1100nm and configurable bandwidth from 100kHz to 20MHz, the module delivers high responsivity and stable performance for precision optical measurement, laser detection, and laboratory applications. The standard SM1 optical interface and SMA RF output allow easy integration into optical systems.

Key Features

Large 5.8x5.8mm photosensitive area for high optical collection efficiency
Wide spectral response: 320–1100nm
Bandwidth configurable up to 20MHz
Free-space input with SM1 internal thread
High responsivity and low noise
SMA female output with 50Ω impedance
Rugged aluminum housing
Compact integrated amplifier design
Wide operating temperature range

Applications

Laser pulse detection and measurement
Optical sensing and monitoring
Scientific research and laboratory testing
Free-space optical communication
Photometry and light intensity analysis
Industrial optical detection systems

Specifications

Model-Specific Performance Parameters

Model	PD58A-100k	PD58A-1M	PD58A-10M	PD58A-20M
Core Material	Silicon (Si)	Silicon (Si)	Silicon (Si)	Silicon (Si)
Operating Wavelength Range	320-1100nm	320-1100nm	320-1100nm	320-1100nm
Optical Input Interface	Free-Space (SM1 Internal Thread)	Free-Space (SM1 Internal Thread)	Free-Space (SM1 Internal Thread)	Free-Space (SM1 Internal Thread)
Photosensitive Area Size	5.8x5.8mm	5.8x5.8mm	5.8x5.8mm	5.8x5.8mm
Responsivity (@850nm)	0.45A/W	0.45A/W	0.45A/W	0.45A/W
Electrical Bandwidth	DC-100kHz	DC-1MHz	DC-10MHz	DC-20MHz
Signal Rise Time	3.5μs	350ns	35ns	18ns
Transimpedance Gain (High-Res Load)	1MV/A	200kV/A	2kV/A	8kV/A
Saturated Optical Power	6.2μW	45μW	4mW	1.1mW
Output Bias Voltage (High-Res Load)	240mV	60mV	6mV	4mV
Noise Equivalent Power (NEP)	5.6pW/√Hz	6.2pW/√Hz	21.5pW/√Hz	30.6pW/√Hz

Universal Parameters (All PD58 Models)

Performance Parameter	Specification
Maximum Output Amplitude	4.5V
Recommended Operating Voltage	±12V DC
Maximum Operating Current	<200mA
Output Impedance	50Ω (RF Standard)
Output Coupling Mode	DC
Electrical Output Connector	SMA Female
Operating Temperature Range	-20°C ~ +65°C
Storage Temperature Range	-40°C ~ +85°C
Enclosure Material	Aluminum Alloy
Customization Support	Full Parameter Tailoring

Response Curve

Mechanical Dimensions

Schematic Diagram of Light-Sensitive Distance Measurement

FAQ

Q：Do you have an unboxing picture of the photodetector?

A：When you buy our photodetectors, we will deliver SMA to BNC RF cable, and power supply for free.
Q: What are the advantages of your photodetectors compared to Thorlabs?
A: We support custom development and we offer better prices.
Q: What is the lead time for photodetector modules?
A: Basically, we have more than 90% of detectors in stock, only a few models need 3 weeks lead time.
Q: Do you support the sale of those countries, and is the shipping included?
A: Our service is available worldwide, regardless of country or region. Shipping is included.
Q: Who are your typical customers?
A: More than 100 top universities and research institutes in China have chosen us and given us high evaluations, such as: Chinese Academy of Sciences, CEC, Tsinghua University, Peking University and other clients.