Buying Balanced Photodetectors
Balanced photodetectors are suitable for sensitively measuring differences in optical powers between two inputs while largely suppressing common noise. They are used in applications such as sensitive absorption measurements, optical heterodyne detection, and quantum optics experiments.
Making Good Purchase Decisions
RP Photonics helps to not only to find all relevant suppliers, but also to make good purchase decisions:
Learning Resources
With its comprehensive resources, RP Photonics helps you to well prepare purchase decisions:
- Encyclopedia article: balanced photodetection
Aspects to Consider Before Buying
Some aspects to consider before buying balanced photodetectors: sensitivity, bandwidth, accuracy of matching of photodiodes, operational stability, ease of integration, compatibility with other systems.
For responsible purchase decisions, we recommend applying good practices.
Find Suppliers for Balanced Photodetectors
12 suppliers for balanced photodetectors are listed in the RP Photonics Buyer's Guide, out of which 3 present their product descriptions. Both manufacturers and distributors can be registered.
| Suppliers with Advertising Package presenting their product descriptions | |
|---|---|
 Lasers, Optics, Electronics. Made in Germany. ALPHALAS GmbHBertha-von-Suttner-Str. 5 37085 Göttingen Germany |  ALPHALAS offers balanced photodetectors with bandwidths from DC up to 10 GHz and wavelength ranges from 170 nm to 2600 nm. Both free-space and fiber-coupled models are available. |
 Sophisticated Tools for Signal Recovery FEMTO Messtechnik GmbHKlosterstraße 64 10179 Berlin Germany |  The photoreceivers of the HBPR series use two photodiodes selected in pairs, which are connected in anti-parallel, and a subsequent low-noise transimpedance amplifier to detect the differential signal. The HBPR series is characterized by a very low input noise (NEP) down to 3.7 pW/√Hz and a high common mode rejection (CMRR) of up to 55 dB. Various models with Si or InGaAs photodiodes and bandwidths from 100 MHz to 500 MHz are available. The output coupling is switchable (AC/DC), the gain can be set in two stages and the bandwidth can be limited to 20 MHz. Two monitor outputs with 10 MHz bandwidth enable fast, separate acquisition of the individual input signals. |
 Luruper Hauptstrasse 1 22547 Hamburg Germany See us at SPIE Photonics West 2025 in San Francisco, January 25–30 (booth 3218)! |  Our balanced detectors are engineered for quantum optics applications with low electronic noise and high quantum efficiencies. The on-board demodulation circuit offers the possibility to generate error signals and implement locking loops for the experiment or application. Available standard wavelengths include 1064 nm and 1550 nm. Other wavelengths and fiber coupling are possible upon request. Visit our website to learn more and see how our technology can support your research. |
| Other Suppliers | |
|---|---|
| Beijing Keyang Photonics Co. Ltd. China | |
| Beijing Rofea Optoelectronics Co., Ltd. China | |
| HC Optical Science and Tech China | |
| Insight Photonic Solutions, Inc. United States | |
| Koheron France | |
| Laser Components GmbH Germany | |
| Newport Corporation United States | |
| Wieserlabs UG (haftungsbeschränkt) Germany | |
| Xiamen Fengxing Optoelectro-tek Co., Ltd. China | |
