Fiber Coupled Laser Diode, 635nm, Multi-emitter

Key Features:

  • Up to 5W CW output power
  • 635nm
  • 105µm core diameter MM fiber
  • 0.22 Numerical Aperture
  • Highly efficient
  • Highly stable
  • Superior beam quality
  • Long diode lifetime


There are many configurations and options available. If you do not see exactly what you need below, please contact us!


Part Number
Part Description
Lead Time

Fiber Coupled Laser Diode, Pigtailed , 635 /-5nm, 5W, WD Package w/ Thermistor, PD, 1m long 105um, 0.22NA fiber with FC connector

$2,170.00 $1,875.00

2-4 weeks

Get Quote

The RPK635M is a high-power, multi-mode OEM laser diode.  This fiber-coupled, 635nm diode laser offers up to 5W of continuous wave (CW) output from a 105-micron core diameter pigtailed fiber optic cable, terminated with a SMA905 connector.  All of these diode lasers utilize proprietary fiber-coupling techniques, resulting in volume products with high efficiency, stability, and superior beam quality. The RPK635M achieves this by transforming the asymmetric radiation from the laser diode chip into an output fiber with a small core diameter by using special micro-optics, resulting in exceptional brightness.  Additionally, RPK-Series laser diodes go through an extensive inspection and burn-in procedures at each step of the production process, ensuring reliability, stability, and lifetime.


RPMC provides a complete, turn-key laser diode system option for the K Series, suitable for material processing, medical therapeutics, and pumping solid-state laser media. Delivering up to 200W of diode laser into a 100~400um core fiber, the system makes it easy to develop new applications. The Turn-Key Laser Diode System is available in the following wavelengths: 450nm, 635mn, 660nm, 680nm, 690nm, 793nm, 808nm, 830nm, 9xxnm, 1470nm, 1550nm. Other wavelengths are available upon request. With control over the operating temperature of the diode laser, as well as current and pulse width, the system offers flexibility and an easy-to-use interface. The system can be controlled either by the front panel user interface or by a computer-controlled RS-232 interface.

RDS3 Features:

  • Up to 200W output power
  • Select from 11 standard wavelengths
  • Other wavelengths available upon request
  • Air cooling
  • Fiber delivery
  • Temperature control
  • Red aiming beam (optional)

Wavelength (nm)

Output power (W)





How can we help you?

Talk to one of our experienced product managers today!

Contact us

Component FAQs
Can I operate multiple laser diodes from the same power supply?

The same power supply can drive multiple laser diodes if they are connected in series, but they must never be connected in parallel. When two diodes are connected in series, they will function properly as long as the compliance voltage is large enough to cover the voltage drop across each diode. For example, suppose you are trying to power two diode lasers, each with an operating voltage of 1.9 V, and connect the two in series. In that case, the pulsed or CW laser driver must have a total voltage capacity greater than 3.8 V. This configuration works because diodes share the same current when connected in series. In contrast, when two diodes are connected in parallel, the current is no longer shared between the two diodes. Get more details on the topic in this article: “Can I Operate Multiple Laser Diodes From the Same Power Supply?” Get more information from our Lasers 101, Blogs, Whitepapers, FAQs, and Press Release pages in our Knowledge Center!

Can laser diodes emit green, blue, or UV light?

The output wavelength of a semiconductor laser is based on the difference in energy between the valance and conduction bands of the material (bandgap energy). Since the energy of a photon is inversely proportional to its wavelength, this means that a larger bandgap energy will result in a shorter emission wavelength. Due to the relatively wide bandgap energy of 3.4 eV, gallium nitride (GaN) is ideal for the production of semiconductor optoelectronic devices, producing blue wavelength light without the need for nonlinear crystal harmonic generation. Since the mid-’90s, GaN substrates have been the common material utilized for blue LEDs. In recent years, GaN based laser technology has provided blue, green and UV laser diodes, now available in wavelengths from 375 nm to 521 nm, with output powers exceeding 100 watts. Read our article, titled “Gallium Nitride (GaN) Laser Diodes: Green, Blue, and UV Wavelengths” to learn more about GaN Based Laser Diodes, available through RPMC. Get more information from our Lasers 101, Blogs, Whitepapers, and FAQs pages in our Knowledge Center!

How long will a laser diode last?

Honestly, it depends on several factors, and there is no simple chart to cover everything. Typical diode lifetimes are in the range of 25,000 to 50,000 hours. Though, there are lifetime ratings outside this range, depending on the configuration. Furthermore, there are a wide range of degradation sources that contribute to a shorter lifespan of laser diodes. These degradation sources include dislocations that affect the inner region, metal diffusion and alloy reactions that affect the electrode, solder instability (reaction and migration) that affect the bonding parts, separation of metals in the heatsink bond, and defects in buried heterostructure devices. Read more about diode lifetime and contributing factors in this article: “Understanding Laser Diode Lifetime.” Get more information from our Lasers 101, Blogs, Whitepapers, FAQs, and Press Release pages in our Knowledge Center!

What factors affect the lifetime of laser diodes?

There are a great many factors that can increase or decrease the lifetime of a laser diode. One of the main considerations is thermal management. Mounting or heatsinking of the package is of tremendous importance because operating temperature strongly influences lifetime and performance. Other factors to consider include electrostatic discharge (ESD), voltage and current spikes, back reflections, flammable materials, noxious substances, outgassing materials (even thermal compounds), electrical connections, soldering method and fumes, and environmental considerations including ambient temperature, and contamination from humidity and dust. Read more about these critical considerations and contributing factors in this article: “How to Improve Laser Diode Lifetime: Advice and Precautions on Mounting.” Get more information from our Lasers 101, Blogs, Whitepapers, FAQs, and Press Release pages in our Knowledge Center!

What is a laser diode?

A Laser Diode or semiconductor laser is the simplest form of Solid-State Laser. Laser diodes are commonly referred to as edge emitting laser diodes because the laser light is emitted from the edge of the substrate. The light emitting region of the laser diode is commonly called the emitter. The emitter size and the number of emitters determine output power and beam quality of a laser diode. Electrically speaking, a laser diode is a PIN diode. The intrinsic (I) region is the active region of the laser diode. The N and P regions provide the active region with the carriers (electrons and holes). Initially, research on laser diodes was carried out using P-N diodes. However, all modern laser diodes utilize the double-hetero-structure implementation. This design confines the carriers and photons, allowing a maximization of recombination and light generation. If you want to start reading more about laser diodes, try this whitepaper “How to Improve Laser Diode Lifetime.” If you want to read more about the Laser Diode Types we offer, check out the Overview of Laser Diodes section on our Lasers 101 Page!