1.54 μm Microchip DPSS Laser
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Senior Engineer, Yilin
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FAQ
We are a national high-tech enterprise in China. For each product, we cover the entire industrial chain, ranging from research and development to manufacturing, and then to technical service solutions.
We provide samples and will try our best to keep the fees as low as possible. If you are our regular customer, we will offer some free samples.
You can contact sales online to get latest price; Or you can leave message to us. Our sales will contact you as soon as possible. And the price we provide is normally FOB price.
We accept payments via T/T, PayPal and LC.
Our minimum order quantity is 1 pc.
Please contact sales to confirm if we still have goods in stock. If yes, we will ship goods to you in one week time after we receive your payment. If not, please confirm with sales.
Usually we ship goods to customer via express, such as DHL, FedEx, UPS, TNT or airway transportation. You can also ask us to send goods to your forwarder in China. And we will pay domestic freight.
Yes, we provide OEM/ODM service. Lead time of customized products need to be confirmed with sales. Usually we will ship products after 2 months time after we receive customer’s payment.
Our skilled and friendly salesmen are ready to answer your questions about our products and services at any time, from product selection to application. Free technical consultation services are offered by request. Our experienced engineers are here to cooperate with you on your special requirements or OEM designs.
The specifications of our products are subject to change without notice. Please ask necessary questions before you order.
Laser products are warranted to conform to ERDI’ s published specifications and to be free from defects in materials and workman-ship for a period of twelve months starting on the shipping date. ERDI will repair or replace (at our decision) ASAP without charge, any part(s) found to be defective during the warranty period.
Our warranties do not cover damages due to misuse, negligence or accidents or due to installations, repairs or adjustments not authorized by ERD.
If a problem occurs and can’t be solved by phone, fax, or email, you may return products to ERDI. Please contact us for a Return Material Authorization (RMA) number prior to shipping the laser. We’ll provide you details on shipping and customs information with the RMA number. All lasers and components should be carefully packed to avoid damage during shipment.
Basic Composition and Pumping Mechanism
The LD (Laser Diode) pumped erbium-doped glass laser is a solid-state laser that uses erbium-doped (Er3+) glass as the gain medium and a semiconductor laser as the pumping source. Its core working principle is as follows
Pumping Source: The laser diode (LD) emits light of a specific wavelength (usually 940 nm). It excites the erbium ions to the metastable high-energy level through direct absorption or indirect energy transfer.
Gain Medium: During the stimulated emission process, the Er3+ ions in the erbium-doped glass transition from the 4I13/2 energy level to the ground state (4I15/2), releasing laser light with a wavelength of approximately 1.535 μm.
Resonant Cavity: It is composed of a high-reflectivity mirror and a partially reflective mirror. Through multiple reflections, it amplifies the photons and forms a coherent laser output.
Characteristics of the Eye-Safe Wavelength Band
The output wavelength of the erbium-doped glass laser is around 1.5 μm, which falls within the near-infrared wavelength band. This wavelength is classified as "eye-safe" (Class 1M) according to international standards. Because the photon energy at this wavelength is relatively low, and it is easily absorbed by the anterior structures of the eyeball (such as the cornea and the lens), it can avoid causing damage to the retina. It is particularly suitable for applications in open environments.
