At Aumictech, we specialize in advanced repair and restoration of high-precision optical test equipment, including the renowned Bristol Instruments 671 Series Laser Wavelength Meters. With a deep understanding of interferometric laser metrology and photonics hardware, our team delivers cost-effective, expert-level repair solutions to keep your wavelength meter functioning at factory-level performance.
If your 671 Series unit is malfunctioning, producing inaccurate wavelength readings, or showing internal errors, we can diagnose, repair, and recalibrate it to precise, NIST-traceable standards — all from our state-of-the-art facility in Downingtown, PA.
About the 671 Series – Precision Demands Careful Repair
The Bristol 671 Series is designed for high-accuracy absolute wavelength measurements of CW lasers. With resolution capabilities down to 0.2 parts per million (ppm) and operating ranges between 375 nm and 12 µm, these instruments are critical for:
- Laser diode manufacturing
- Optical R&D labs
- Photonics testing
- Fiber optic communications
- Metrology-grade validation of tunable lasers
However, due to the complexity of their Fizeau interferometer design, internal reference lasers, and fiber-based optics, these instruments are susceptible to alignment drift, photodiode degradation, and internal optical component failures over time.
Aumictech offers complete component-level diagnostics and repair to restore full measurement confidence.
Common Issues with the 671 Series – And What We Fix
Over years of use, the Bristol 671 often experiences subtle or catastrophic issues such as:
🔧 Drifted Wavelength Readings
- Caused by interferometer misalignment, environmental changes, or aging optical components
- We recalibrate and realign internal optics to factory specs
🔧 Unstable Reference Laser (HeNe)
- The internal HeNe laser may become weak, unstable, or fail
- We replace the HeNe tube and realign the reference path
🔧 No Signal Detected / Measurement Failure
- May be due to photodetector failure, fiber input contamination, or electronic faults
- We test and replace sensors, clean optics, and restore board-level communication
🔧 Fan or Power Supply Noise / Failure
- Noisy or failing fans can affect internal temperature stability
- We replace fans, power supplies, and restore proper thermal control
🔧 Software Interface Issues
- If the unit fails to communicate with your PC or software stalls
- We update firmware, reflash boards, and test all I/O interfaces
🔧 Broadening or Inaccurate Linewidths
- Indicates degraded optical paths or filter errors
- We evaluate the full optical train and clean/replace filters or fibers as needed
Every repaired unit is recalibrated across multiple laser lines and benchmarked against NIST-traceable gas cell references to ensure certified accuracy and performance.
What Our Repair Process Includes
Our 671 Series repair service is comprehensive and precise:
- Full Diagnostic Evaluation
- Visual inspection, signal verification, laser stability analysis, optical inspection
- Component-Level Repair
- We replace only the necessary parts, avoiding full module swaps unless needed
- Optical Realignment
- Realign the internal interferometer and fiber coupling for peak performance
- Internal Cleaning
- Remove dust, residue, and fiber contaminants affecting readings
- Firmware & Interface Testing
- Ensure connectivity and UI performance across all supported modes
- Final Calibration
- Validate wavelength accuracy, linearity, and resolution to factory spec or better
- Detailed Test Report
- Before and after performance data, repair summary, and calibration certificate
Why Choose Aumictech for Your 671 Series Repairs?
While Bristol Instruments provides OEM service, many labs choose Aumictech for faster, more affordable, and more flexible support:
✅ Expertise in Fizeau Interferometer Systems
✅ Component-level repair — not just part swaps
✅ Support for both current and legacy 671 models
✅ Extensive inventory of optical and electronic replacement parts
✅ Fast turnaround — rush services available
✅ Detailed reports and calibration data
✅ 15-day return-on-repair (ROR) guarantee
✅ One-stop solution: repair + recalibration
We understand the tight tolerances and precision required for high-resolution optical metrology equipment — and we treat every unit with the same care as a research lab would.
Turnaround Time and Shipping
- Standard repairs typically completed in 5–10 business days
- Rush repair and calibration available in 1–3 days
- Secure packaging, tracking, and insurance included
- We ship domestically and internationally via FedEx, UPS, or DHL
- Drop-off service available at our Downingtown, PA location
Each unit is returned fully tested, sealed, and accompanied by a certificate of service and optional recalibration data.
Supported Versions of the 671 Series
We support the full 671 line, including:
- 671A – Visible Range
- 671B – Near-IR
- 671C – Extended IR (Up to 2.6 μm)
- 671D – Deep IR / Mid-IR range (Up to 12 μm)
- Customized OEM 671 models
If you’re unsure of your model or the issue, just email us at sales@aumictech.com with the serial number or a photo of the label — we’ll get back to you with a recommendation.
Additional Services for Bristol Equipment
Alongside 671 repairs, we also offer:
- Annual Recalibration Services
- Preventive Maintenance Plans
- Support for 871 and 771 Series
- Test Setup Consulting
- Asset Tracking and Lab Equipment Management
Whether you have one unit or an entire lab of Bristol equipment, we’ll help you maintain uptime and accuracy across all optical test stations.
How to Send Your Unit for Repair
Getting started is easy:
- Email us at sales@aumictech.com with your model number and issue
- Receive a free service estimate and RMA instructions
- Ship your 671 Series unit to Aumictech in Downingtown, PA
- We’ll complete the repair and return it with a detailed report
For urgent support or annual lab scheduling, just include “Rush” or “Bulk Inquiry” in your subject line.
Restore Your Measurement Accuracy with Aumictech
If your Bristol Instruments 671 Series wavelength meter is underperforming or showing errors, don’t wait for total failure. Let Aumictech restore it with expert-level optical repair, full recalibration, and unmatched customer service.
📧 Contact us today at sales@aumictech.com for a quote, consultation, or general inquiry. We’re ready to support your lab with precision.
