What is the price of a 685nm laser diode

The price of a 685nm laser diode typically ranges from $30 to $200 USD, depending on power, packaging, and features.

Overview

The cost of a 685nm laser diode varies based on several factors:

• Output Power: Low-power diodes (around 5–10mW) are generally at the lower end of the price range, while higher-power diodes (20mW or more) cost more .
• Package Type: TO-18, butterfly, or pigtailed fiber-coupled packages affect pricing. Fiber-coupled or thermoelectrically cooled diodes are more expensive due to added components .
• Mode Type: Single-mode diodes are usually pricier than multi-mode diodes because of their higher beam quality and precision .
• Supplier and Quantity: Wholesale purchases or bulk orders from suppliers like Alibaba can reduce per-unit cost, while specialized OEM or research-grade modules from Edmund Optics or RPMC Laser may be at the higher end .

Typical Price Examples

• Edmund Optics offers pigtailed 685nm laser diodes suitable for lab applications, generally in the $50–$150 range depending on power and accessories .
• Laser Diode Source lists 20mW butterfly-packaged 685nm diodes with internal TE coolers, which are typically priced around $150–$200 due to the integrated cooling and fiber coupling .
• Berlin Lasers provides single-mode 685nm diodes at affordable prices, often starting near $30–$50 for basic TO-18 packages .
• Alibaba offers bulk or wholesale 685nm diodes, where prices can drop significantly per unit, sometimes below $20 for large orders .

Recommendation

For precise pricing, it is best to contact suppliers directly or check their online catalogs, as prices fluctuate based on stock, specifications, and shipping. Additionally, consider whether you need features like fiber coupling, TE cooling, or single-mode operation, as these significantly impact cost.