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Solid State Lasers and Laser Diodes from RPMC Lasers Inc » Products » Multi-Emitter

Multi-Emitter Laser Diodes

Multi-Emitter Laser DiodesWhat is a Multi-Emitter Laser Diode?

Multi Emitters include devices that utilize multiple single emitters in the package, usually multimode laser diode emitters and typically fiber-coupled output.  By combining the output of multiple single emitter devices, the output power can be increased. An advantage of Multi-Emitters is they require lower current than a laser diode bar-based approach.

Benefits of Multi-Emitter Laser Diodes

  1. Increased output power: Because multiple emitters are integrated into a single package, the overall output power of the laser is increased.
  2. Improved efficiency: The use of multiple emitters allows for more efficient use of electrical power, resulting in a lower operating cost.
  3. Compact design: The integration of multiple emitters into a single package results in a smaller, more compact design when compared to multiple single emitter packages.
  4. Increased reliability: Multi-emitter laser diodes have a high degree of reliability due to the fact that they have multiple emitters to compensate for any failure of a single emitter.
  5. High-density beam array: Multi-emitter laser diodes are able to produce multiple laser beams simultaneously, which can be useful in certain applications, such as material processing, where a high-density beam array is necessary.

What is the Difference Between a Multi-Emitter Laser Diode and a Laser Diode Array (Bar)?

While these two laser diode types are very similar, there are a couple key differences. The simplest way to describe the difference is that a Multi-Emitter Laser Diode contains multiple single emitter laser diode chips, each with their own individual heatsink and these chips are typically wired in series. A Laser Diode Array (or Laser Diode Bar) contains multiple single emitters, all on the same substrate, sharing a heatsink, and therefore are typically all connected in parallel.

Our Multi-Emitter Laser Products

Our Multi-Emitter Laser Diodes are available in the blue, red, and near infrared (NIR) wavelengths.  Furthermore, the output power ranges from mWs on the single mode laser diodes, to watts in the multimode emitters and VCSELS, to multi KW on the multi-emitter fiber coupled modules and systems. We also have options for stabilized laser diodes utilizing a Volume-Bragg grating (VBG).

Finally, there are many different packages to choose from and if you do not see the package type needed, we offer many custom packages.

Deeper Dive into Multi-Emitter Laser Diodes

Multi-Emitter Laser Diode Applications

Red Laser Diodes for Photodynamic Therapy

PDT has been shown to be as effective as surgery or radiation for treating certain cancers, without the risks of invasive surgery or the long-term side effects of radiation treatment. One study on the topic in which a detailed computer model was developed to describe how human skin reacted to various wavelengths presented in 2011 by Mustafa, Et al. from the Universiti Sains Malaysia, School of Medical Physics.  In the presentation they demonstrated a realistic skin model where they simulated the absorption and depth penetration laser wavelengths ranging from 308 nm to 635 nm, showing that red light was absorbed at approximately 1/7th the rate of ultraviolet light allowing for up to 5 times deeper depth pentation.

Read the full article here.

Laser Diode Crown Troughing in Dentistry

Near-infrared (around 800 nm) fiber coupled diode lasers are typically used in dentistry for crown troughing, where the fiber (usually 400-micron core diameter) is directed at the tooth soft tissue interface causing the tissue to pull back from the tooth.   It is important that the laser power is selected so that enough energy is imparted to cause the tissue to pull back, but not so intense that the tissue burn.  For this reason, most crown troughing lasers are limited to CW operation in the 600 mW to 800 mW range, or pulsed operation in the 1.2 w to 1.6 W power range.

Read the full article here.

Let Us Help

If you have any questions, or if you would like some assistance please Contact Us here. Furthermore, you can email us at info@rpmclasers.com to talk to a knowledgeable Product Manager.

Alternatively, use the filters on this page to assist in narrowing down the selection of Multi-Emitter lasers for sale. Finally, head to our Knowledge Center with our Lasers 101 page and Blogs, Whitepapers, and FAQ pages for further, in-depth reading.

Finally, check out our Limited Supply – In Stock – Buy Now page: This page contains an ever-changing assortment of various types of new lasers at marked-down/discount prices.

 

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Picture Part Number Type Wavelength (nm) Output power (W) Mode Output Linewidth Duty Package
BDL130-808-F4-F Multi-Emitter 808 130.0 Multimode MM Fiber CW Fiber Coupled
RPK1450M Multi-Emitter 1450 15.0 Multimode MM Fiber CW Fiber Coupled
RPK1470M Multi-Emitter 1470 15.0 Multimode MM Fiber CW Fiber Coupled
K Series RPK445M Multi-Emitter 445 10.0, 15.0, 20.0, 50.0 Multimode MM Fiber CW Fiber Coupled
RPK635M Multi-Emitter 635 5.0 Multimode MM Fiber CW Fiber Coupled
Multi-Emitter Laser Diodes RPK793M Multi-Emitter 793 8.0, 12.0, 16.0, 30.0, 50.0, 80.0, 90.0, 140.0, 180.0 Multimode MM Fiber CW Fiber Coupled
RPK808M Multi-Emitter 808 15.0, 25.0, 30.0, 55.0, 60.0, 150.0 Multimode MM Fiber CW Fiber Coupled
K878BNXRN-30.00W: 878nm Fiber Coupled Diode Laser RPK878MS Multi-Emitter, Volume Bragg Grating (VBG) Laser Diodes 878 30.0, 65.0, 120.0 Multimode MM Fiber Narrow CW Fiber Coupled
K878BNXRN-30.00W: 878nm Fiber Coupled Diode Laser RPK888MS Multi-Emitter, Volume Bragg Grating (VBG) Laser Diodes 888 65.0, 120.0 Multimode MM Fiber Narrow CW Fiber Coupled
RPK915M Multi-Emitter 915 30.0, 70.0, 160.0, 180.0, 300.0, 370.0 Multimode MM Fiber CW Fiber Coupled
Multi-Emitter Laser Diodes RPK940M Multi-Emitter 940 20.0, 30.0, 70.0, 120.0, 150.0, 200.0 Multimode MM Fiber CW Fiber Coupled
RPK976M Multi-Emitter 976 15.0, 20.0, 30.0, 70.0, 150.0, 200.0, 330.0, 540.0 Multimode MM Fiber CW Fiber Coupled
RPK976MS Multi-Emitter, Volume Bragg Grating (VBG) Laser Diodes 976 18.0, 27.0, 60.0, 100.0, 140.0, 180.0, 400.0 Multimode MM Fiber Narrow CW Fiber Coupled
KA64HAMCA-10.00W: 1064nm Fiber Coupled Laser Diode RPKA64M Multi-Emitter 1064 20.0 Multimode MM Fiber CW Fiber Coupled
RWLB-980-012-H Multi-Emitter 980 12.0 Multimode MM Fiber CW Fiber Coupled
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RPK Series

The RPK Series of multiple, single-emitter fiber-coupled diode lasers are available in wavelengths from 405nm thru 1550nm with up to 300W output power. Our specialized fiber-coupling techniques ensure high efficiency, stability, and superior beam quality, while rigorous inspections and burn-in procedures guarantee each product’s reliability, stability, and long lifetime. Highly customizable packages allow us to meet our customers’ specific needs, providing high-quality products at reasonable prices.