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Description

VENUS Series 975 nm High Stability Multi‑Mode Pump Laser Source – VLSM‑980‑B

The VENUS Series VLSM‑980‑B is a high‑power, 975 nm multi‑mode pump laser source engineered for demanding fiber laser and fiber amplifier applications. Designed as a benchtop, fully integrated system, it combines a single‑emitter, high‑brightness pump diode with precision thermal and drive electronics to deliver stable, repeatable optical power. The wavelength and output characteristics are optimized for pumping double‑clad fiber lasers and amplifiers, particularly in Yb‑doped systems operating around 1 µm, where 975 nm offers efficient absorption and low quantum defect.

A key feature of this source is its built‑in optical isolator, providing up to 30 dB isolation at the output. This effectively suppresses backward amplified spontaneous emission (ASE) and reflections from the fiber laser or amplifier under test, protecting the internal pump diode from damage and ensuring long‑term reliability. In contrast to many bare pump modules and lower‑end diode drivers, the VLSM‑980‑B integrates feedback protection and optimized drive circuitry, minimizing current and temperature fluctuations that can otherwise degrade diode lifetime and output stability.

The VLSM‑980‑B offers typical output powers of 9 W and 25 W at 975 nm, with a narrow spectral width and optional wavelength stabilization for applications requiring precise pump wavelength control. A continuously adjustable output power range (with coarse and fine tuning modes) allows users to accurately set and ramp pump levels during system development or characterization. The high‑definition front‑panel LCD simultaneously displays current and voltage, giving immediate visual feedback on operating conditions and making it straightforward to reproduce experimental settings.

Integrated thermoelectric cooling (TEC) maintains the diode at a tightly controlled temperature, typically within ±0.1 °C, across an operating temperature range designed for lab and light industrial environments. This precise thermal management stabilizes both output power and wavelength, which is crucial for consistent coupling efficiency into double‑clad fibers and for maintaining optimal overlap with the absorption band of the gain fiber. Power stability is typically within ±0.5 % over 15 minutes and ±1 % over 8 hours after warm‑up at 25 °C, providing the temporal uniformity needed for long measurement runs and production testing.

The output is delivered through a high‑power multimode fiber (105/125 µm core/cladding with NA=0.15 or 0.22), terminated by an FC/APC connector for low back‑reflection and convenient integration into fiber‑based setups. Standard output fiber length is greater than 1 m, offering flexibility in benchtop layouts and system racks. The benchtop unit features a compact footprint of approximately 335 mm (L) × 280 mm (W) × 150 mm (H), making it suitable for crowded optical tables and test stations where space is at a premium.

In addition to 975 nm operation, related configurations of this platform can be specified at other key pump wavelengths such as 915 nm and 940 nm, supporting different absorption peaks or thermal management strategies for fiber lasers and amplifiers. The VENUS series is thus well suited not only as a primary pump source for double‑clad Yb‑doped fiber lasers, but also as a flexible building block for research on new gain fibers, high‑power amplifier chains, and wavelength‑specific pumping schemes.

Typical use cases for the VLSM‑980‑B include pumping of single‑mode or large‑mode‑area double‑clad fiber lasers, pre‑amplifiers and power amplifiers in MOPA architectures, spectral and temporal characterization of fiber devices, and general test and measurement tasks in advanced fiber photonics laboratories. Its combination of high output power, robust isolation, precise thermal and current control, and convenient benchtop operation makes it a reliable choice for both research environments and manufacturing test lines where high stability and high uptime are critical.

VENUS Series 975nm High Stability Multi-Mode Pump Laser Source

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Specifications

Bandwidth: 7 nm
Center Wavelength: 975 nm
Output Power: 25000 mW
Polarization: Random
Model: VLSM-980-B
Series: VENUS SERIES
Product Type: 975 nm High Stability Multi-mode Pump Laser Source
Typical Output Power Options: 9 W, 25 W
Output Power (min): 9 W
Output Power (typ): 25 W
Output Power Stability (15 Min, Typ): ±0.1 %
Output Power Stability (15 Min, Max): ±0.5 %
Output Power Stability (8 H, Typ): ±1.0 %
Output Power Stability (8 H, Max): ±2.0 %
Peak Operation Wavelength (min): 970 nm
Peak Operation Wavelength (typ): 975 nm
Peak Operation Wavelength (max): 985 nm
Spectral Width FWHM (typ): 5 nm
Spectral Width FWHM (max): 7 nm
Output Isolation (typ): 30 dB
Output Power Tunable Range: 0–100 %
Output Power Tunable Mode: Coarse/fine
TEC Stability (typ): ±0.1 °C
TEC Stability (max): ±0.2 °C
TEC Operating Range (min): 25 °C
TEC Operating Range (max): 35 °C
Operating Voltage (min): 170 VAC
Operating Voltage (max): 260 VAC
Power Consumption (typ): 100 W
Power Consumption (max): 220 W
Operating Temperature (min): 0 °C
Operating Temperature (max): 50 °C
Storage Temperature (min): -40 °C
Storage Temperature (max): 85 °C
Output Fiber Type: 105/125 μm, NA=0.15 or 0.22
Length Of Output Fiber: > 1 m
Output Fiber Connector: FC/APC (other options available)
Dimension: 335(L) × 280(B) × 150(H) mm
Available Wavelengths (other Options): 915 nm, 940 nm
Isolation Of Backward ASE: 30 dB
Package Options: B-Benchtop, M-Module
Feedback Protection Options: 0-None, 1-Yes

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Features

  • High Output Power up to 25 W – Delivers robust multi‑mode 975 nm pumping power (typical 9 W and 25 W versions) for driving high‑power double‑clad fiber lasers and fiber amplifiers.
  • Optimized 975 nm Pump Wavelength – Peak operation wavelength 970–985 nm (typ. 975 nm) for efficient pumping of Yb‑doped fibers and other 1 µm band fiber lasers.
  • Wavelength-Stabilized Options – Optional wavelength‑stabilized configuration (narrow spectral width ~5–7 nm FWHM) ensures consistent pump performance and improved system stability.
  • Built‑In 30 dB Optical Isolation – Integrated high‑isolation pump diode design provides ≥30 dB isolation against backward ASE, greatly reducing the risk of feedback‑induced damage to the pump laser diode.
  • Excellent Output Power Stability – High stability output with typical short‑term power fluctuation ≤±0.1% (15 min) and long‑term stability ≤±1.0% to ±2.0% over 8 hours at 25 °C after warm‑up.
  • Continuously Adjustable Output Power – Wide tuning range (0–100% rated power) with coarse/fine power control mode enables precise pump level adjustment for research, prototyping, and production testing.
  • Integrated High‑Resolution LCD Display – Benchtop VENUS series units feature a clear LCD that simultaneously displays pump current and voltage for real‑time monitoring and easier operation.
  • Advanced Feedback Protection – Optional feedback protection schemes tailored for different fiber laser and amplifier wavelengths improve device lifetime and safeguard against back‑reflections and ASE.
  • High Reliability, Long‑Life Design – Single‑emitter pump diode architecture, precise TEC control, and optimized thermal management (TEC stability typically ±0.1 °C) ensure high reliability in 24/7 operation.
  • Wide Operating Temperature Range – Designed for laboratory and light industrial environments with typical operating temperature from +10 °C to +35 °C (storage down to −40 °C), supporting stable performance in real‑world conditions.
  • Efficient Thermal Control – Internal thermoelectric cooler (TEC) with tight temperature regulation enhances wavelength and power stability while minimizing drift due to ambient temperature changes.
  • Flexible Pump Fiber Output – Uses standard high‑brightness pump fiber (105/125 µm, NA 0.15 or 0.22), enabling efficient coupling into double‑clad active fibers used in most high‑power fiber laser designs.
  • FC/APC Pump Output Connector – Standard FC/APC output connector (other connector options available) offers low‑reflection, robust coupling and easy integration with existing fiber laser setups.
  • Benchtop and Module Configurations – Available as a benchtop source (VLSM‑980‑B) for laboratory use with front‑panel control, and as a compact module (VLSM‑980‑M) for OEM and system integration.
  • Compact Benchtop Footprint – Space‑efficient enclosure (approx. 335 mm (L) × 280 mm (W) × 150 mm (H)) saves valuable optical table or rack space while maintaining easy access to controls and connectors.
  • Universal AC Power Input – Operates from standard AC mains (typ. 100–240 VAC) with power consumption tailored to output rating, simplifying deployment in global labs and production lines.
  • Application‑Ready for Fiber Lasers & Amplifiers – Designed specifically as a stable multi‑mode pump source for double‑clad fiber lasers, high‑gain fiber amplifiers, and other 1 µm band systems.
  • Ideal for Test, Measurement & Spectral Analysis – High stability and adjustable output make the VENUS series suitable for spectral analysis, test and measurement setups, and other precision laboratory experiments.
  • Multiple Wavelength Options Available – In addition to 975 nm, alternative pump wavelengths (such as 915 nm and 940 nm) are available on request to match various rare‑earth‑doped fiber systems.
  • Custom Pump Protection Solutions – Connet Laser can provide customized feedback isolation and protection configurations for different laser wavelengths and architectures, ensuring optimal system compatibility.

Applications

  • Pumping for High‑Power Double‑Clad Fiber Lasers – Primary pump source at 975 nm for Yb‑doped double‑clad fiber lasers used in materials processing, industrial machining, and macro‑/micro‑fabrication.
  • Fiber Amplifier Pumping (Yb‑ and Er/Yb‑Doped) – Stable multi‑mode pump for high‑gain Yb‑doped fiber amplifiers and Er/Yb co‑doped amplifiers in systems such as LIDAR, free‑space communication, and high‑power EDFAs.
  • Seeded Fiber Laser and MOPA Systems – Pump stage for master‑oscillator power‑amplifier (MOPA) architectures requiring high‑brightness, high‑reliability pump sources with integrated feedback protection.
  • High‑Power CW and Quasi‑CW Fiber Sources – Pumping of continuous‑wave and modulated high‑power fiber sources used in welding, cutting, marking, cleaning, cladding, and additive manufacturing.
  • Nonlinear Frequency Conversion Pumping – Pump source for frequency‑doubled, frequency‑mixed, and supercontinuum fiber systems where stable, high‑power 975 nm radiation is required to drive nonlinear processes.
  • LIDAR and Remote Sensing Fiber Transmitters – Backend pump for high‑energy fiber transmitters used in atmospheric sensing, wind LIDAR, range‑finding, and environmental monitoring.
  • Optical Communications Test and Burn‑In – High‑power pump for stress testing, burn‑in, and reliability evaluation of passive and active fiber components (isolators, combiners, WDMs, couplers, connectors, and fiber terminations).
  • Spectral Characterization and ASE/Noise Studies – Stable pump for studying amplified spontaneous emission (ASE), gain spectra, and noise characteristics of active fibers and fiber devices in R&D laboratories.
  • Fiber Bragg Grating (FBG) Pumped Systems – Pumping of FBG‑stabilized Yb‑doped fiber lasers and narrow‑linewidth oscillators where high optical isolation and wavelength‑stabilized pump options are required.
  • High‑Power Pump Combiners and Pump Modules – Source for qualifying pump/signal combiners, multi‑pump modules, and cladding‑pumped assemblies used in industrial fiber laser heads.
  • Scientific Research in Nonlinear and Ultrafast Optics – General pump source in laboratories exploring nonlinear effects in fibers, fiber‑based supercontinuum, pulse amplification, and high‑energy ultrafast fiber systems.
  • Optical Power Handling and Reliability Testing – High‑stability bench source for long‑term reliability tests, lifetime studies, and thermal management evaluation of high‑power fiber components and coatings.
  • Spectroscopy and Pump–Probe Experiments – Pump beam for fiber‑based spectroscopy setups, pump–probe experiments, and broadband source pumping where a robust, user‑controlled high‑power pump is needed.
  • Laser Safety and Protection Circuit Development – Reference high‑power diode‑based source with built‑in feedback protection for developing, calibrating, and validating laser safety interlocks and protection electronics.
  • Educational and Training Laboratories – Demonstration source in university and technical‑institute labs for teaching high‑power fiber laser design, pump coupling, thermal effects, and fiber handling practices.
  • OEM System Integration – Compact module version for integration into OEM fiber laser cabinets, medical laser platforms (where allowed by regulations), and custom photonics instruments requiring reliable 975 nm pumping.
  • General Test and Measurement – Versatile laboratory workhorse for characterizing insertion loss, back‑reflection, power handling, and isolation of optical devices over extended periods with high stability.

Frequently Asked Questions

What is the Connet VENUS VLSM-980-B 975 nm high stability multi‑mode pump laser source used for?
The VENUS series VLSM-980-B is a 975 nm multi‑mode benchtop pump laser source designed primarily to pump double‑clad fiber lasers and fiber amplifiers. Typical uses include driving high‑power Ytterbium‑doped fiber lasers, providing pump power for fiber amplifiers, and serving as a stable, high‑brightness source for spectral analysis, R&D, test and measurement, and other laboratory and manufacturing applications where a reliable, high‑power pump at around 975 nm is required.
What are the key technical specifications of the VENUS 975 nm multi‑mode pump laser source?
For the VLSM‑980‑B VENUS series pump laser, the typical peak operating wavelength is 975 nm (with a tunable range roughly from 970 to 985 nm, depending on model and ordering options), and typical output powers are 9 W or 25 W (other powers available on request). The spectral width (FWHM) is about 5–7 nm, and the built‑in optical isolator provides about 30 dB isolation against backward ASE. Short‑term output power stability over 15 minutes is typically ±0.1–0.5%, and long‑term stability over 8 hours is typically ±1–2% at 25 °C after warm‑up. The unit uses 105/125 µm multimode fiber (NA 0.15 or 0.22) with an FC/APC connector as standard and operates from a 100–260 VAC mains supply in a 335 × 280 × 150 mm benchtop housing.
How does the VENUS pump laser protect against back‑reflections and ASE damage?
The VENUS 975 nm pump source integrates a wavelength‑stabilized single‑emitter pump diode with a built‑in optical isolator that provides approximately 30 dB isolation of backward amplified spontaneous emission (ASE) and other reflections. This isolation significantly reduces the backward optical power reaching the pump diode, helping to prevent catastrophic diode failure and performance degradation. In addition, the VENUS series incorporates feedback protection electronics (available as an option in the ordering code) that monitor operating conditions and can shut down or limit the output in the presence of abnormal back‑reflections or over‑temperature events, enhancing long‑term reliability in fiber laser and amplifier systems.
What fiber type and connector does the VENUS 975 nm pump laser use, and can they be customized?
The standard output fiber for the VENUS VLSM‑980‑B is a 105/125 µm multimode fiber with a numerical aperture (NA) of 0.15 or 0.22, optimized for efficient pumping of double‑clad fibers. The default connector is FC/APC to minimize back‑reflection into the pump source. Connet Laser can supply other connector types on request (for example, FC/PC or custom high‑power connectors) and can provide a compact module‑style package (instead of the benchtop unit) for system integration where fiber length and connector style may be tailored to the user’s design.
How stable is the output power of the VENUS series, and what conditions are required to achieve the specified stability?
The VENUS 975 nm pump laser is designed for high power stability in both the short and long term. Under typical laboratory conditions at 25 °C with at least 30 minutes of warm‑up, the short‑term (15‑minute) output power stability can be as good as ±0.1–0.5%, and the long‑term (8‑hour) stability is typically within ±1–2%, assuming a stable environment and appropriate fiber handling. This level of stability is achieved through precise TEC temperature control of the pump diode (TEC stability about ±0.1 °C over a 30 °C operating range) and closed‑loop current control. For best performance, the unit should be operated in a temperature‑controlled lab, with clean, properly connected fiber and minimal mechanical disturbance.
What is the difference between the benchtop and module versions of the VENUS multi‑mode pump laser?
The VLSM‑980‑B is the benchtop version of the VENUS series, featuring a fully integrated power supply, high‑definition LCD display showing current and voltage, and continuously adjustable output power with coarse and fine tuning. It is ideal for R&D labs, testing, and characterization. Connet also offers module (M) packages with the same core laser and control electronics but in a more compact form factor for OEM and system integration, where the user provides the external power supply and control interface. Both versions can be ordered with similar power and wavelength options, as indicated by the ordering code VLSM‑980‑P‑PW‑ (P denotes package type, PW denotes output power, and SP denotes feedback protection).
What wavelength and power options are available for the VENUS multi‑mode pump laser, and how do I specify them when ordering?
The standard VENUS multi‑mode pump laser discussed here is centered around 975 nm, but Connet Laser also offers other popular pump wavelengths such as 915 nm and 940 nm for different fiber laser and amplifier designs. Typical standard output power options are 9 W and 25 W, with other power levels available on request depending on diode availability and thermal configuration. The ordering code is VLSM‑980‑P‑PW‑, where P indicates the package (B for benchtop, M for module), PW is the nominal output power in watts (e.g., 9 for 9 W, 25 for 25 W), and SP specifies feedback protection (0 for none, 1 for included). For customized wavelength, power, fiber type, or connector, customers are advised to contact Connet Laser directly for a tailored configuration.

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

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