Square Aspherical Lenses for Optical Communication Collimation Applications

Core Features + Optical Comm Adaptation Advantages + Our Advantages

Square aspherical lenses focus on “high-precision collimation and rectangular optical path adaptation”, designed specifically for optical communication scenarios. They accurately solve collimation needs in optical modules, fiber coupling, and other links.

Combined with our 15 years of optical communication customization experience, the advantages are more prominent:

1. Precise adaptation to rectangular paths, fitting compact optical module designs:

Optical communication modules (SFP+/QSFP28) mostly have rectangular optical paths (e.g., 8mm×6mm, 12mm×8mm). Square aspherical lenses can be directly embedded without adaptation, saving 30% installation space compared to circular lenses. We customize small square models (3mm×3mm to 20mm×15mm) for optical modules, with tolerance ±0.01mm, perfectly matching the narrow internal paths of optical modules.

2. Top collimation precision for optical comm bands, reducing signal loss:

Aspheric structure optimized for core optical communication bands (1310nm, 1550nm) eliminates spherical aberration, with beam parallelism error ≤0.1°. After collimation, optical signal coupling efficiency increases to over 98%. We provide dedicated AR coatings for 1310/1550nm (transmittance ≥97%) by default, and support custom coatings for CWDM/DWDM full bands (1260-1625nm), reducing optical communication link loss (≤0.3dB).

3. Durability for optical comm environments, adapting to industrial scenarios:

Made of fused silica/BK7 glass (mainstream materials for optical communication). With ultra-precision molding + 5-axis grinding, surface roughness Ra≤0.5nm, laser damage threshold ≥30J/cm² (1550nm), it can withstand long-term operating temperatures of optical communication equipment (-40℃~+85℃) and 85% humidity without attenuation, complying with Telcordia GR-468 standards.

4. Fast response for optical comm customization, strong mass production support:

For the short R&D cycles of optical communication customers, regular optical communication models are available as samples within 1-7days, and bulk orders are delivered in 3-4 weeks. We have a 2000㎡ cleanroom, with batch consistency error <1%, supporting full-cycle supply for optical module manufacturers from R&D sampling to million-level mass production.

Core Applications: Focus on Optical Communication Collimation Scenarios (with Pain Point Solutions)

1. Optical Module Path Collimation (SFP+/QSFP28/COBO)

• • Pain point: Lasers (VCSEL/DFB) in optical modules emit divergent light. Circular lenses easily block rectangular paths after collimation, leading to low coupling efficiency (<95%) and large signal attenuation.
  • Solution: Square aspherical lenses accurately align with laser output ports, collimating 1310/1550nm lasers. With our custom low-loss AR coating (transmittance ≥97.5% at 1550nm), optical signal coupling efficiency increases to over 98%, adapting to 10G/25G/100G optical modules and meeting long-distance (10km+) optical transmission needs.

2. Fiber Coupling Collimation (Single-Mode/Multi-Mode Fibers)

• • • Pain point: When coupling fibers (SC/LC connectors) with lasers/detectors, divergent light is hard to align with fiber cores, leading to coupling loss >1dB and affecting optical communication link stability.
    • Solution: Square aspherical lenses collimate divergent laser light into parallel light, then accurately couple it to fiber cores. We customize collimated spot sizes based on fiber core diameters (9μm single-mode/50μm multi-mode), reducing coupling loss to below 0.3dB, adapting to data centers and 5G base station fiber connections.

3. Optical Communication Test Equipment (OTDR/Optical Power Meter)

• • Pain point: Test equipment needs to collimate optical signals to simulate actual transmission links. Circular lenses produce uneven spots after collimation, leading to large test errors (>0.5dB).
  • Solution: Square aspherical lenses collimate test light (1310/1550nm), outputting uniform rectangular spots. With our high-uniformity coating process, test errors are reduced to within 0.1dB, improving optical communication link test accuracy.

4. Coherent Optical Communication (Coherent) Modules

• • Pain point: Coherent optical modules require extremely high beam collimation precision (parallelism error ≤0.08°), which ordinary lenses cannot meet, leading to large phase noise.
  • Solution: High-precision square aspherical lenses (parallelism error ≤0.08°) + narrow-band AR coating for 1550nm. We achieve λ/15 surface flatness (632.8nm), reducing beam phase distortion, adapting to 400G/800G coherent optical modules and ensuring stable high-speed optical communication signals.