ROF GBPR 150MHz Gain Adjustable Balanced Photodetector Module FC SMA

Name: ROF GBPR 150MHz Gain Adjustable Balanced Photodetector Module FC SMA
Brand: BEIJING ROFEA OPTOELECTRONICS CO,. LTD.
Availability: InStock

Description

ROF-GBPR-150M Series Gain Adjustable Balanced Detection Module (DC–150 MHz)

The ROF-GBPR-150M series is a high‑performance, gain‑adjustable balanced detection module designed for precise optical signal measurement over a wide frequency range from DC to 150 MHz. Engineered for demanding laboratory, industrial, and system-integration environments, this balanced detector offers five selectable gain levels, enabling users to optimize sensitivity, bandwidth, and dynamic range for a wide variety of optical test scenarios. With versions covering both 850–1650 nm (InGaAs, ROF-GBPR-150M-A-DC) and 400–1100 nm (Si, ROF-GBPR-150M-B-DC), the module is suitable for telecom wavelengths, fiber‑optic communications, laser diagnostics, and general photonics research.

In many precision photonic measurements, balanced detection is essential for suppressing common‑mode noise such as laser intensity fluctuations, environmental interference, and electronic pickup. The ROF-GBPR-150M series incorporates a matched PIN photodiode pair and a low‑noise transimpedance front end to deliver a common‑mode rejection ratio (CMRR) greater than 25 dB. This allows users to detect small differential signals buried under large common‑mode backgrounds, which is especially valuable in coherent communication experiments, interferometry, optical heterodyne/homodyne detection, and quantum optics setups. By offering a choice between InGaAs and Si detector types, the module aligns with typical operating wavelengths used in both telecom‑band and visible/near‑IR laser systems, enhancing flexibility across different platforms.

A key advantage of this series is its five‑step gain adjustment, providing conversion gains of 10³, 10⁴, 10⁵, 10⁶, and 10⁷ V/A. Each gain setting corresponds to a specific effective 3 dB bandwidth (DC–150, 45, 4, 0.3, and 0.1 MHz), giving users precise control over the trade‑off between sensitivity and speed. At lower gain settings, the detector supports high‑speed measurements up to 150 MHz for fast modulation, pulsed laser characterization, and high‑frequency signal analysis. At higher gain settings, it achieves improved sensitivity for low‑power or weakly modulated signals, making it suitable for applications such as lock‑in detection, low‑light spectroscopy, and precision metrology. Compared with many fixed‑gain balanced photoreceivers found in standard catalogs, this integrated, multi‑gain approach reduces the need for external amplification stages and simplifies system design.

The noise performance of the ROF-GBPR-150M series is carefully optimized across its operating bands, with typical output noise levels ranging from about 30 mVRMS in the lowest bandwidth setting down to around 3 mVRMS at the full 150 MHz range. This enables detection sensitivities down to approximately −60 dBm (InGaAs version) or −57 dBm (Si version) under DC–0.1 MHz operation, while still maintaining competitive sensitivity at higher bandwidth settings. At the upper end of the dynamic range, the module supports continuous‑wave saturated optical powers up to 0 dBm or 3 dBm depending on wavelength and bandwidth, with a maximum input optical power rating of 10 mW. This combination of low noise and wide linear range makes the detector well‑suited for experiments where both weak and relatively strong signals must be measured without reconfiguring the entire setup.

From a system‑integration perspective, the module is designed for straightforward deployment in optical testbeds and OEM instruments. It operates from a standard ±15 V DC supply with a working current under 100 mA, making it easy to power from typical laboratory supplies or system backplanes. The optical input is provided via an FC/APC connector, which minimizes back‑reflection and is compatible with common single‑mode fiber infrastructures. On the electrical side, the output is a 50 Ω SMA connector, ready to interface with oscilloscopes, RF spectrum analyzers, data acquisition cards, and lock‑in amplifiers. The default DC‑coupled output (with optional AC coupling) supports analysis of both slow and fast signal components, including low‑frequency drifts and modulation envelopes, which is often a limitation of AC‑only receivers available on the market.

Thermal and environmental robustness are also considered in the ROF-GBPR-150M series design. The module operates reliably over a temperature range of −20 to 70 °C and can be stored between −40 and 85 °C, making it suitable for both controlled laboratory environments and more demanding field or rack‑mounted installations.

Specifications

Central Wavelength:	850 – 1650 nm
Quantum Efficiency (typical):	Not Specified
Quantum Efficiency (max):	Not Specified
Active Area Size:	Not Specified
Angle Of Incidence (AOI):	Not Specified
Max Total Input Power:	10 mW
3dB Bandwidth:	150 MHz
AC High Pass Cutoff:	Not Specified
Output Impedance:	Not Specified
Dark Noise Clearance (min):	Not Specified
DC Output Voltage:	-15 – 15 V
RF Input Frequency:	Not Specified
RF Input Power (max):	Not Specified
Product Series:	ROF-GBPR gain adjustable balanced detection module
Wavelength Response (standard):	850–1650 nm
Wavelength Response (optional):	400–1100 nm
Model ROF-GBPR-150M-A-DC Spectral Response Range:	850–1650 nm
Model ROF-GBPR-150M-B-DC Spectral Response Range:	400–1100 nm
Detector Type (A-DC):	InGaAs/PIN
Detector Type (B-DC):	Si/PIN
Responsivity (A-DC):	≥0.95 A/W @ 1550 nm
Responsivity (B-DC):	≥0.5 A/W @ 850 nm
3 DB Bandwidth (all Gain Gears):	DC–150, 45, 4, 0.3, 0.1 MHz
Common Mode Rejection Ratio:	>25 dB
Gain Adjustable:	5 gain gears
Conversion Gain (high Resistance State):	10^3, 10^4, 10^5, 10^6, 10^7 V/A
Noise Voltage (DC–0.1 MHz):	30 mVRMS
Noise Voltage (DC–0.3 MHz):	12 mVRMS
Noise Voltage (DC–4.0 MHz):	10 mVRMS
Noise Voltage (DC–45 MHz):	6 mVRMS
Noise Voltage (DC–150 MHz):	3 mVRMS
Sensitivity (A-DC, DC–0.1 MHz):	-60 dBm
Sensitivity (A-DC, DC–0.3 MHz):	-47 dBm
Sensitivity (A-DC, DC–4.0 MHz):	-40 dBm
Sensitivity (A-DC, DC–45 MHz):	-30 dBm
Sensitivity (A-DC, DC–150 MHz):	-23 dBm
Sensitivity (B-DC, DC–0.1 MHz):	-57 dBm
Sensitivity (B-DC, DC–0.3 MHz):	-44 dBm
Sensitivity (B-DC, DC–4.0 MHz):	-37 dBm
Sensitivity (B-DC, DC–45 MHz):	-27 dBm
Sensitivity (B-DC, DC–150 MHz):	-20 dBm
Saturated Optical Power (A-DC, DC–0.1 MHz):	-33 dBm
Saturated Optical Power (A-DC, DC–0.3 MHz):	-23 dBm
Saturated Optical Power (A-DC, DC–4.0 MHz):	-13 dBm
Saturated Optical Power (A-DC, DC–45 MHz):	-3 dBm
Saturated Optical Power (A-DC, DC–150 MHz):	0 dBm
Saturated Optical Power (B-DC, DC–0.1 MHz):	-30 dBm
Saturated Optical Power (B-DC, DC–0.3 MHz):	-20 dBm
Saturated Optical Power (B-DC, DC–4.0 MHz):	-10 dBm
Saturated Optical Power (B-DC, DC–45 MHz):	0 dBm
Saturated Optical Power (B-DC, DC–150 MHz):	3 dBm
Operating Voltage:	DC ±15 V
Working Current:	<100 mA
Maximum Input Optical Power:	10 mW
Output Impedance:	50 Ω
Operating Temperature:	-20–70 ℃
Storage Temperature:	-40–85 ℃
Output Coupling Mode (default):	DC coupling
Output Coupling Mode (optional):	AC coupling
Input Optical Connector:	FC/APC
Electrical Output Interface:	SMA
Supported Bandwidth Options (family):	10M, 80M, 200M, 350M, 400M, 1G, 1.6G, 150M
Operating Wavelength Code A:	850–1650 nm (1550 nm test)
Operating Wavelength Code B:	320–1000 nm (850 nm test)
Operating Wavelength Code A1:	900–1400 nm (1064 nm test)
Operating Wavelength Code A2:	1200–1700 nm (1310 nm or 1550 nm test)

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Features

Wide Wavelength Coverage – Supports 850–1650 nm as standard for InGaAs/PIN (telecom bands including 1310 nm & 1550 nm) and optional 400–1100 nm Si/PIN version for VIS–NIR applications, covering most fiber‑optic and free‑space optical test scenarios.
DC to 150 MHz Bandwidth with Selectable Settings – Five selectable bandwidth/gain gears from DC–0.1 MHz up to DC–150 MHz, enabling optimization for low‑frequency, narrowband, or broadband measurements in one compact module.
Five‑Step Gain Adjustment – Programmable transimpedance gain of 10³, 10⁴, 10⁵, 10⁶, 10⁷ V/A allows precise optimization of sensitivity and dynamic range for weak, medium, or strong optical signals.
Balanced Detection Architecture – Integrated balanced (differential) detector design provides improved noise performance and common‑mode noise suppression, ideal for coherent detection, interferometry, and intensity noise cancellation.
High Common‑Mode Rejection Ratio (CMRR) – CMRR of > 25 dB effectively suppresses common‑mode intensity and environmental noise, enhancing SNR compared with single‑ended detectors used in similar frequency ranges.
Low Noise Performance – Optimized low‑noise amplification with typical output noise as low as 3 mV RMS at DC–150 MHz, improving detection of small optical power fluctuations in demanding lab and production test environments.
High Optical Sensitivity – Detects very low CW optical powers, with sensitivity down to approximately −60 dBm (DC–0.1 MHz) for the 850–1650 nm version and −57 dBm for the 400–1100 nm version, suitable for weak‑signal measurements and precision metrology.
Wide Linear Dynamic Range & Saturation Handling – Saturated optical power up to 0 dBm to +3 dBm at the highest bandwidth gear, combined with a maximum safe input power of 10 mW, provides a broad dynamic range for both low‑level and higher‑power signals.
Flexible Coupling Options – Standard configuration uses DC coupling on the RF output for low‑frequency and DC measurements, with AC coupling available on request to match high‑frequency test setups and protect downstream instruments.
Industry‑Standard Optical & Electrical Interfaces – Equipped with FC/APC fiber input to minimize back‑reflection in fiber systems and a 50 Ω SMA electrical output, ensuring easy integration with RF instruments, oscilloscopes, analyzers, and OEM boards.
Multiple Spectral Response Options Across the Series – The ROF‑GBPR/ROF‑BPR family supports additional bands such as 320–1000 nm (B), 900–1400 nm (A1), and 1200–1700 nm (A2), making it a scalable platform for different wavelengths and bandwidths up to 1.6 GHz.
Stable ±15 V Supply Operation – Operates from a standard ±15 V DC power input with < 100 mA current consumption, compatible with common laboratory and OEM power rails.
Robust Environmental Specifications – Wide operating temperature range of −20 to +70 °C and storage range of −40 to +85 °C, supporting both laboratory use and more demanding industrial or field environments.
Compact, Professional Module Design – Purpose‑built, shielded module provides mechanical robustness and EMI reduction, facilitating clean integration into optical test benches, coherent receivers, and system‑level optical front‑ends.
Ideal for Advanced Optical Measurement Applications – Suited for optical communication testing, coherent detection, optical heterodyne/homodyne systems, laser RIN and intensity noise measurements, interferometric sensing, and high‑precision metrology where adjustable gain and balanced detection are critical.

Applications

High‑speed coherent optical communication systems
Ideal as a gain‑adjustable balanced detector for coherent receivers, intradyne and heterodyne detection, and advanced modulation formats (QPSK, QAM) in metro, long‑haul, and data‑center interconnect links.
Optical heterodyne and homodyne detection
Used to mix a local oscillator (LO) with weak signal light for phase‑sensitive detection in laboratory and industrial coherent detection setups from DC up to 150 MHz.
Laser phase and frequency noise measurement
Balanced configuration and high CMRR (>25 dB) enable precise characterization of laser phase/frequency noise, linewidth, and relative intensity noise (RIN) for telecom, sensing, and metrology lasers.
Quantum optics and quantum communication experiments
Suitable for balanced homodyne detection of squeezed states, entangled photons, and weak quantum signals in free‑space or fiber‑based quantum key distribution (QKD) and quantum information research.
Optical time‑domain and frequency‑domain reflectometry
Enhances sensitivity in coherent OTDR/OFDR setups for distributed fiber sensing, fault location, and component characterization over telecom wavelengths (InGaAs) or visible/near‑IR (Si).
High‑precision interferometry and metrology
Supports Mach‑Zehnder, Michelson, and Sagnac interferometers where common‑mode noise rejection and adjustable gain are critical for measuring tiny phase or path‑length variations.
Optical coherence tomography (OCT) and biomedical imaging
Applicable as a balanced detection front‑end in time‑domain and swept‑source OCT systems to improve SNR, reduce excess noise, and enable higher‑contrast imaging in medical and biological research.
Laser stabilization feedback loops
Provides low‑noise error signals for active laser frequency, phase, and intensity stabilization in cavity locking, Pound–Drever–Hall (PDH) locking, and servo control systems.
Precision spectroscopy and metrology
Used in coherent and heterodyne spectroscopy, frequency comb detection, and high‑resolution absorption/dispersion measurements where DC–150 MHz bandwidth and tunable gain are required.
Fiber‑optic sensor interrogation
Improves performance of interferometric fiber sensors (FBG arrays, Fabry‑Perot, Sagnac, and distributed acoustic/vibration sensors) by rejecting common‑mode noise and optimizing gain to the signal level.
Optical RIN and low‑frequency noise characterization
DC‑coupled operation allows accurate measurement of laser intensity noise and low‑frequency fluctuation analysis across multiple gain/bandwidth settings.
Optical communication transceiver development and testing
Serves as a flexible balanced front‑end for evaluating new modulation formats, advanced DSP algorithms, and integrated photonic transmitters/receivers in R&D environments.
Free‑space optical (FSO) links and atmospheric channel research
Si and InGaAs balanced detection options support experimental FSO and visible/IR communication links requiring high sensitivity and mitigation of atmospheric intensity noise.
Optical gyro and inertial sensing systems
Used in interferometric fiber‑optic gyroscopes (FOGs) and related inertial sensors where balanced readout improves detection of rotation‑induced phase shifts and minimizes drift.
Ultrafast and mode‑locked laser diagnostics
Enables balanced RF detection of pulse trains, amplitude noise, and beat notes from mode‑locked and comb lasers in the DC–150 MHz range for timing and stability analysis.
Optical component and subsystem characterization
Suitable for testing modulators, attenuators, filters, splitters, integrated photonics chips, and other passive/active devices under balanced detection to measure insertion loss, phase, and intensity noise.
Laboratory teaching and advanced photonics training
Balanced detector module is convenient for university and training labs to demonstrate coherent detection, homodyne/heterodyne techniques, interferometry, and noise suppression concepts.
Low‑light and weak‑signal detection in R&D
High conversion gain (up to 107 V/A), selectable bandwidth, and low noise voltage make the module ideal for detecting very weak optical signals in physics, chemistry, and engineering experiments.

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Frequently Asked Questions

What is the ROF-GBPR Series gain adjustable balanced detection module and what are its main applications?

The ROF-GBPR Series is a gain‑adjustable balanced photodetector module with DC–150 MHz bandwidth designed for precision optical signal detection. It offers five selectable gain levels with corresponding bandwidths, allowing users to optimize between sensitivity, noise performance, and speed. Typical applications include coherent and intensity‑modulation/direct‑detection (IM/DD) fiber‑optic links, laser RIN and noise measurements, optical heterodyne/homodyne detection, optical communication system testing, quantum optics experiments, and general laboratory photonics measurements where common‑mode noise rejection and adjustable gain are important.

What wavelength ranges and detector types are available for the ROF-GBPR-150M balanced detector?

The ROF‑GBPR‑150M series is available in two main spectral options: (1) ROF‑GBPR‑150M‑A‑DC: 850–1650 nm using an InGaAs PIN photodiode, optimized and specified at 1550 nm. (2) ROF‑GBPR‑150M‑B‑DC: 400–1100 nm using a Si PIN photodiode, optimized and specified at 850 nm. In the broader ROF BPR/GBPR family, additional wavelength bands (A1: 900–1400 nm, A2: 1200–1700 nm) are supported for higher‑frequency versions (1 GHz, 1.6 GHz), typically with AC‑coupled outputs. This makes the product line comparable to telecom‑band InGaAs and VIS‑band Si balanced detectors from other photonics vendors.

How does the gain adjustment work and what bandwidths are available for each gain setting?

The ROF‑GBPR‑150M balanced detector provides five selectable gain settings that trade off transimpedance gain with usable bandwidth. The conversion gain options are 10³, 10⁴, 10⁵, 10⁶, and 10⁷ V/A in the high‑resistance state. Corresponding 3 dB bandwidths are approximately DC–150 MHz, DC–45 MHz, DC–4 MHz, DC–0.3 MHz, and DC–0.1 MHz. Lower gain settings offer higher bandwidth and higher maximum optical power handling, while higher gain settings provide better sensitivity at lower frequencies. The gain selection is typically done via on‑module controls or configuration pins (details depend on the exact mechanical and electrical revision), similar in concept to multi‑gain balanced detectors offered by other manufacturers.

What is the common‑mode rejection ratio (CMRR) and why is it important in a balanced detector?

The ROF‑GBPR‑150M specifies a common‑mode rejection ratio (CMRR) greater than 25 dB. CMRR quantifies how effectively the balanced detector suppresses signals that are common to both photodiodes, such as laser intensity noise, environmental pickup, and certain types of electrical interference. A higher CMRR means better cancellation of common‑mode noise and more accurate detection of the differential (signal) component. In practical terms, CMRR > 25 dB is suitable for many fiber‑optic test, coherent detection, and precision metrology applications where noise suppression is critical; it is comparable to or better than many general‑purpose balanced photoreceivers in the same frequency range.

What are the key electrical and optical performance specifications (bandwidth, noise, sensitivity, and saturation power)?

For the ROF‑GBPR‑150M‑A‑DC (InGaAs, 850–1650 nm) and ROF‑GBPR‑150M‑B‑DC (Si, 400–1100 nm), the main performance parameters are: • 3 dB bandwidth settings: DC–150, 45, 4, 0.3, and 0.1 MHz (depending on gain). • Responsivity: ≥0.95 A/W at 1550 nm (InGaAs), ≥0.5 A/W at 850 nm (Si). • Noise voltage (VRMS): about 3 mV (DC–150 MHz), 6 mV (DC–45 MHz), 10 mV (DC–4 MHz), 12 mV (DC–0.3 MHz), 30 mV (DC–0.1 MHz), for both A and B versions. • Sensitivity (typical minimum detectable optical power): for the A version, from around –60 dBm at DC–0.1 MHz to –23 dBm at DC–150 MHz; for the B version, from about –57 dBm to –20 dBm over the same bandwidth steps. • Saturated optical power (CW): for the A version, from about –33 dBm (lowest bandwidth/highest gain) up to 0 dBm at 150 MHz; for the B version, from –30 dBm up to +3 dBm at 150 MHz. Maximum input optical power is 10 mW. These values place the module in the range of low‑to‑medium‑noise, laboratory‑grade balanced receivers with competitive sensitivity versus similar units listed on FindLight and other photonics catalogs.

How do I power and connect the ROF-GBPR balanced detector in my setup?

The ROF‑GBPR‑150M modules require a dual DC supply of ±15 V with a typical operating current below 100 mA. Electrically, the RF/differential output is provided via an SMA connector with 50 Ω output impedance, suitable for direct connection to 50 Ω oscilloscopes, spectrum analyzers, or digitizers. By default, the output coupling mode is DC‑coupled; AC‑coupled versions are available on request or in other model variants. On the optical side, the standard input is an FC/APC fiber connector for low back‑reflection; some part numbers in the BPR/GBPR family also support free‑space (FS) coupling. To integrate it safely, use the correct ±15 V supply polarity, maintain proper grounding, and keep the optical power within the specified saturation and maximum power limits.

How do I choose the correct ROF-BPR/ROF-GBPR model (bandwidth, wavelength band, coupling, and gain type)?

Model selection is based on four main criteria: (1) Bandwidth: Codes such as 10M, 80M, 200M, 350M, 400M, 1G, and 1.6G indicate the 3 dB bandwidth (e.g., ROF‑BPR‑350M for 350 MHz). The 150 MHz gain‑adjustable GBPR version provides multiple bandwidths in a single module. (2) Wavelength band: A (850–1650 nm), B (320–1000 or 400–1100 nm, depending on series), A1 (900–1400 nm), and A2 (1200–1700 nm) specify the spectral response and test wavelength. Choose based on your laser or system wavelength. (3) Coupling type: DC or AC determines whether low‑frequency/DC components are preserved (DC) or blocked (AC). Lower‑frequency units (10–400 MHz) can be ordered with either AC or DC coupling; 1 GHz and 1.6 GHz versions are AC‑coupled only. (4) Gain type: BPR denotes fixed‑gain balanced detectors, while GBPR denotes gain‑adjustable balanced detectors. Optional codes such as "H" can indicate high‑gain types in some variants. When in doubt, match the part code structure (e.g., ROF‑BPR‑350M‑A‑FC‑AC) to your required bandwidth, wavelength, input type (FC or FS), and coupling mode, or compare directly to similar balanced detectors on FindLight to align performance with your existing equipment.

Got more questions? Use the inquiry form to ask the supplier directly.