NakuLaser Blog

Why the erbium-doped fiber amplifier has the largest gain at 1531nm？ The energy difference between the metastable state and the ground state of the rare earth element Er(3+) doped in the fiber is equivalent to the energy of the photon of 1550 nm. When the pump light energy (980 nm or 1480 nm) of the appropriate wavelength is absorbed, the electrons will transition from the ground state. To the higher energy level of the excited state. Then, a small amount of energy is released and transferred to a more stable metastable state. When the pumping source is sufficient, the electrons of the erbium ion are reversed, that is, the metastable state of the high energy level is larger than the number of ground state electrons having a lower energy level. When the appropriate light signal passes, the metastable electrons will have a stimulated radiation effect, emitting a large number of photons of the same wavelength, but because of the vibrational energy level, the wavelength is not a si

This semiconductor laser is from CivilLaser, it’s a infrared laser system, the wavelength is 980nm, the max output power is 10000mW , and it can be adjusted. It’s a high power invisible laser. It has three working mode: CW, TTL/Analog modulation. Let's check it now.

This semiconductor laser is from CivilLaser, it's a green laser system, the wavelength is 520nm,  output power is 12000mW , it's a 2018 new kind of high power green laser. Let's check it now.

This video is from CivilLaser, it's a infrared near invisible laser system , the wavelength is 808nm, output power is 20W . Let's check it now.

450nm 3W~8W high power semiconductor laser with adjustable power supply [Specifications] Product Name: 450nm Semiconductor laser Output Wavelength: 450nm ± 5 nm Spatial mode: Near TEM00 Output Power: 3W~8W (choose) Operating mode: CW or Modulation Beam Size: 4mmx2mm Beam Divergence Angle:  <3x0.5 mrad High light: <25mm Power Stability:  <3% per 4 hrs Temperature Stabilizing: TEC Warm Up Time: <1minute MTTF(mean time to failure): 10,000 hrs Laser head dimensions: 155(L)x77(W)x60(H)mm3 Modulation:  0~30khz Analog or TTL Power Supply: Standard type power supply / Lab Adjustable power supply (Choose) Warranty: 1 Year

This video is from CivilLaser, it's a Erbium-doped Fiber Amplifier, and it's the Booster - Amplifier, The maximum output power is 33dBm. High power erbium doped fiber amplifier (EYDFA-HP-BA)，based on amplification technology of double clad erbium doped fiber， unique optical packaging technology,  and with reliable hardware light path protection design, realized high power laser output in C band or L band， It has the advantages of high gain and low noise, and can be widely used in CATV, optical fiber communication, laser radar, etc.. Parameters Units Minimum value Typical value Maximum value Remarks Wavelength range nm 1540 1550 1565 C-band Input power dBm -6 3 Output power dBm  10 30、33 Noise index dB 6.0 Polarization dependent gain dB 0.5 Input / output isolation dB 40 Operating temperature range °C -20 +65 Working humidity range % 70 Pigtail c