< >

Balance Detector 10M-400MHz for OCT, Fiber Optic Sensing Systems, Wind Radar

This series of balanced photodetectors with fiber coupled input and SMA output, balanced photodetectors can achieve excellent common mode rejection ratio;

Model：BPD465

Tags： Balanced photodetector Differential photodetector OCT Lidar Fiber-coupled BPD

Manual： Download

Contact： face

Huang Email: Hqy@ybphotonics.com

WhatsApp： +8613427781756 Web | App

Get a Quote How to choose the right photodetector?

Product Info

Introduction

they are widely used in coherent detection applications for distributed fiber optic sensing, and in scenarios such as wind measurement radar.

1. Overview

The balanced photodetector contains two photodiodes and a low-noise transimpedance amplifier, where the two photodiodes are matched to each other for excellent common mode rejection ratio, and the detector subtracts the two detected signals to eliminate the common mode noise, so that small variations of the effective signal can be obtained from the interfering noise. The detector is available in two spectral ranges, 400-1000nm and 1000-1700nm.

2. Features

Covers wavelength range 400-1700nm
Compact housing
Excellent common mode rejection ratio
SMA output connector

3. Applications

OCT
DAS
Outlier detection
Optical delay measurement

4.Specification

Items	BPD465A-10M	BPD465A-75M	BPD465A-200M	BPD465A-400M
Materials	Si
Wavelength	400-1000nm
Input connector	FC
Responsivity	0.5A/W @780nm
Common mode rejection ratio	>25dB
Bandwidth（a）	DC-10MHz	DC-75MHz	DC-200MHz	DC-400MHz
Rise time（a）	36ns	4.5ns	1.8ns	1ns
Gain（b）	1MV/A	165kV/A	30kV/A	10kV/A
Saturated Optical power	8uw	48uw	267uw	800uw
Noise voltage（a）	9mV RMS	8mV RMS	4mV RMS	3.5mV RMS
NEP	4.7pW/√Hz	20.5pW/√Hz	56pW/√Hz	84pW/√Hz

Items	BPD465C-10M	BPD465C-75M	BPD465C-200M	BPD465C-400M
Materials	InGaAs
Wavelength	1000-1700nm
Input connector	FC
Responsivity	0.9A/W @1550nm
Common mode rejection ratio	>25dB
Bandwidth（a）	DC-10MHz	DC-75MHz	DC-200MHz	DC-400MHz
Rise time（a）	36ns	4.5ns	1.8ns	1ns
Gain（b）	1MV/A	165kV/A	30kV/A	10kV/A
Saturated Optical power	4.4uw	27uw	148uw	445uw
Noise voltage（a）	9mV RMS	8mV RMS	4mV RMS	3.5mV RMS
NEP	2.6pW/√Hz	11.4pW/√Hz	32pW/√Hz	48pW/√Hz

Paramas	Detector Common Parameters
Maximum output amplitude（a）	±2.0V
Operating voltage	±12V
Operating Current	<200mA
Output Impedance	50Ω
Output coupling mode	DC
Output connector	SMA female
Operating temperature	-20~65℃
Storage temperature	-40~85℃

Remarks:
a : For 50Ω loads
b : For high resistance loads

5. Mechanical dimensions

6. Response curve

Screenshot of the oscilloscope

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.