FLT, 50-300 mW

FLT, 50-300 mW

Fe:ZnSe/S CW Narrow Line Tunable Mid-IR Laser


IPG's FLT is a tunable Fe:ZnSe/S continuous wave laser featuring a narrow linewidth and a cryogenic cooling system. It provides > 100 mW of output power across a 3.7 - 4.8 μm tuning range, generating >300 mW at the peak of the tuning curve. The spectral linewidth is < 1 nm with a beam mode of TEM00. The FLT laser is pumped by IPG Photonics efficient and reliable Er fiber laser. IPG’s FLT laser is used in a number of applications including pumping Mid-IR OPOs, spectroscopy, sensing, medical and defense.



Tuning Range 3.7-4.8 mm TEM00 Beam Mode
Output Energy up to 300 mW Linear Polarization
Mode of Operation CW, tunable wavelength
Wavelength Tuning Range, nm 3700 - 4800
Output Power, mW > 50 across the tuning range, >300 at 4.2 μ
Linewidth, nm < 1
Beam Mode Quality, M2 < 1.2
Beam Diameter* (FW, 1/e2), mm 3 typ.
Beam Divergence, mrad
 2 typ.
Polarization Linear, Horizontal >100:1
Warm-up Time, min <15 from standby, 60 min from cold start

* Beam diameter may be adjusted to meet customer specifications

Pump Laser*
IPG Photonics CW Erbium or Thuium fiber laser
Pump Laser Dimensions (W x H x D), mm 448 x 403 x 132
Gain Element Operation Temperature**, K 77 - 220
Laser Head Dimensions, mm 330 x 258 x 578
Supply Voltage, VAC, 50 - 60 Hz 110 - 220
Power Consumption***, W 200 typ. 

Pump laser model depends on the combination of parameters
** Optimal operation temperature of a gain element depends on wavelength
*** Electrical power consumption depends on the maximum output power of the laser

FLT Series Datasheet


Spectroscopy Medical
Sensing Defense
Seeding or Pumping Mid-IR OPOs



front and rear views


left view


Top view


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