Yokogawa AQ6370D Optical Spectrum Analyzer – Expert Repair, Optical Realignment & NIST-Traceable Calibration
We offer specialized repair, calibration, and maintenance services for the Yokogawa AQ6370D Optical Spectrum Analyzer (OSA)—one of the most advanced optical test instruments used for telecom, photonics R&D, DWDM component testing, and fiber optic network development. The AQ6370D is known for its high-speed measurement, wide dynamic range, and best-in-class wavelength accuracy across the 600 to 1700 nm range. If your unit is experiencing optical issues, boot failures, interface errors, or measurement instability, our expert team will restore it to full functionality with NIST-traceable calibration and OEM-grade service.
Our Service & Repair Process
Comprehensive Diagnostic Testing
Each AQ6370D unit undergoes an in-depth evaluation using certified tunable lasers, optical reference sources, and signal analyzers to assess:
Wavelength accuracy, drift, and trace repeatability
Signal detection sensitivity and dynamic range
Sweep time, resolution bandwidth (RBW), and span behavior
Input connector integrity and signal coupling
Display, touchscreen, and control panel responsiveness
Communication ports: USB, LAN, GPIB, and remote interface functionality
Internal fan, temperature sensors, and boot diagnostics
Common Issues We Repair
No signal or weak optical detection
Incorrect wavelength readings or instability
Sweep failure or frozen trace display
Internal noise floor increase or degraded dynamic range
Boot-up errors, firmware crashes, or UI freeze
Damaged or loose FC/APC, SC, or LC input connectors
Touchscreen/display dimming, flickering, or failure
Communication interface failure (USB, LAN, GPIB)
Fan, sensor, or power supply issues causing system shutdown
Component-Level Repair & Electronics Restoration
We perform deep circuit board-level repairs, including:
Replacement of capacitors, ICs, regulators, and control chips
Troubleshooting and repair of detector amplifiers and signal processors
Power supply diagnostics and reconditioning
Repair or replacement of GPIB/LAN/USB interface boards
Optical Path Cleaning & Realignment
Precision optical measurement requires a clean, aligned internal path. We:
Clean and re-align input ports, fiber holders, collimators, lenses, and mirrors
Re-calibrate internal monochromator and diffraction grating alignment
Optimize internal optics for minimal loss and stable trace output
Firmware Validation & Internal Function Testing
After repairs, we run full self-test routines and validate:
Auto-calibration and trace repeatability
Remote software compatibility and API response
System boot speed and menu control behavior
Measurement across full wavelength range (600–1700 nm)
NIST-Traceable Calibration & Certification
All units are calibrated using NIST-traceable lasers and optical sources, including:
Wavelength calibration and span verification
Dynamic range, RBW, and sweep validation
Power level linearity and stability checks
We provide a detailed calibration certificate with pre- and post-service test results.
Why Choose Us?
In-depth experience with Yokogawa AQ-series OSAs, including AQ6370D, AQ6370C/B, and AQ6373
Skilled in repairing modern OSAs with touchscreen interfaces and high-speed electronics
Fast turnaround – most units serviced within 3–5 business days
Service warranty included and a 15-day Right of Return
Global shipping support and protective packaging
Flexible payment options: credit card, PayPal, ACH, wire transfer
Ideal For:
Fiber labs and telecom teams using AQ6370D for advanced DWDM and broadband spectrum testing
Research centers needing traceable calibration and high wavelength accuracy
Resellers and buyers restoring used units for resale or redeployment
Engineers troubleshooting trace noise, sweep failure, or alignment drift
Restore Performance & Accuracy to Your Yokogawa AQ6370D
If your Yokogawa AQ6370D Optical Spectrum Analyzer is producing errors, signal drift, or display issues—or if it just needs recalibration—our expert service team is ready. With advanced diagnostics, precision optical alignment, and certified NIST-traceable calibration, we’ll bring your AQ6370D back to like-new performance.
Request a quote today and let us restore your AQ6370D for accurate, reliable optical spectrum analysis.
