The Ando AQ4321A is a tunable laser source spanning 1480–1580 nm, engineered for precise wavelength selection and stable optical output in DWDM system testing and component characterization. Absolute wavelength accuracy of ±15 pm (typical ±10 pm) and wavelength stability of ±0.01 MHz/h enable reliable measurement of dense wavelength division multiplexed networks. A precision motor controls an optical grating at sub-micron resolution, delivering 0.001 nm wavelength set resolution and continuous sweep capability at 100 nm/sec. Internal gas cell absorption calibration ensures traceable, absolute wavelength accuracy across the C-band and extended L-band. Optical output reaches +10 dBm typical at 1550 nm with ±0.01 dB stability and ±0.04 dB reproducibility. Side mode suppression exceeds 50 dB. Automatic power control and photodetector monitoring maintain output level flatness within ±0.1 dB. The instrument connects via FC/PC connectors to single-mode fiber (10/125 µm) and offers full remote control through GPIB or RS-232C interfaces. A 6.4-inch color LCD display and compact 20 kg chassis support laboratory and field deployment. Operating range is +10 to +35°C.
Ando AQ4321A 1480-1580nm Tunable Laser Source
- Repair Support & OEM Spare Parts
- University and Research Discounts
- 100% Verified & Tested Equipment
- Rental Units Available
The Ando AQ4321A is a tunable laser source operating in the 1480-1580nm wavelength range. It provides a stable and precise optical signal for various testing and measurement applications in optical communication systems and component characterization.
$6,779.00
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In stock

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Product Condition & Availability
Ando AQ4321A 1480-1580nm Tunable Laser Source is in excellent working condition and has been thoroughly tested for performance and reliability. We offer both new and professionally refurbished options, depending on availability and customer preference.
Integrated Solutions & Deployment Support
Beyond individual products, Aumictech provides end-to-end solutions for manufacturing line deployment and test station setup. Our team can assist with system integration, configuration, and equipment selection tailored to your production requirements.
Trusted Industry Experience
With over a decade of experience, Aumictech is a recognized leader in RF and optical test equipment sales and services. All units are supported by our in-house calibration and repair facility based in Downingtown, PA, ensuring technical reliability and long-term value.
Customer Commitment
We’re committed to exceptional customer service, offering a 15-day return or replacement (ROR) policy for peace of mind. Our team is always available to assist with pre- and post-sale support.
Fast Shipping & Flexible Payments
We offer rapid global shipping through FedEx, UPS, and DHL, with most orders dispatched within 1–3 business days. Multiple secure payment options are available, including PayPal, ACH, wire transfers, and major credit cards.


























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