After-sales service

Supplementary Terms for After-Sales Service

I. Warranty Policy

1. Warranty Period: Free warranty service is provided within 1 year from the date of customer receipt of the product.

II. Repair Service Details

1. Product Usage Specifications

• Immediately contact our technical support if any abnormality occurs during product use. Unauthorized disassembly is strictly prohibited.

• Disassembly determination criteria: The integrity of the original anti-tamper label is the sole basis.

• Violation penalty: Confirmed cases of self-disassembly will automatically void free repair eligibility, regardless of warranty status, and repairs will be charged at 300% of standard fees.

2. Non-Warranty Scope
   The following cases require paid repairs (cost-based fees apply):

• Damage caused by improper operation

• Damage to laser diodes and output fiber tails (normal service life: tens of thousands of hours)
  Note: Structural components, DC power supplies, current drivers, temperature control systems, display and control circuits are covered under free warranty service.

III. Typical Improper Operations & Prevention Guidelines

1. Improper Operation #1: Disconnecting Fiber Connectors During Laser Emission

• Risks:

  • Disconnecting fiber connectors while laser is active

  • Pump laser output fiber/connector contacting metal/reflective surfaces

• Consequences:

  • Damages fiber connector end faces

  • Causes laser back-reflection, damaging pump laser diode

• Prevention:

  • Never disconnect fibers during operation

  • Use fusion splicing for output-to-WDM connections

  • Fully power off before fiber handling

2. Improper Operation #2: Same-Wavelength Bidirectional Pumping

• Risk: Unabsorbed laser light enters opposite pump

• Consequence: Pump damage

• Prevention:

  • Avoid same-wavelength bidirectional pumping

  • Use different wavelengths if required

3. Improper Operation #3: Poor Optical System Design

• Risks:

  • High-peak-power pulse oscillation

  • Insufficient WDM isolation

  • Nonlinear optical effects

• Consequence: Signal light enters 980nm pump, causing damage

• Prevention:

  • Optimize optical design

  • Ensure proper WDM specs

  • Install pump protectors

4. Improper Operation #4: Direct Pump-to-Fiber Connection (Bypassing WDM)

• Risk: Backward ASE light enters 980nm pump

• Consequence: Instantaneous pump damage

• Prevention:

  • Always use qualified WDM components

  • Install pump protectors

Note: Unspecified matters follow the latest after-sales service policy.