We produce an extensive selection of benchtop single-mode (SM), multimode (MM), and polarization-maintaining fiber (PM) fiber-coupled laser sources uniquely featuring low cost and high stability,  well suited for testing and applications that require constant laser stable output over a long period of time.  Based on an advanced feedback control circuitry, the laser output is locked for a constant output that is adjustable via a front knob or a computer through a USB connection. The display is proportional to the output power.