Interband cascade lasers are semiconductor emitting in the mid-infrared domain but relying on interband transitions, contrary to their intersubband counterparts, quantum lasers. Our experimental study of relative intensity noise a multi-mode laser at 4.1 ?m shows that room-temperature structure exhibits relaxation frequency GHz range. We demonstrate that, far above threshold current, increases ...

In this paper, we study the intensity noise performance of frequency-doubled lasers. particular, investigate how relative (RIN) multimode fiber lasers is affected by second harmonic generation process. We first develop an analytical approach and show that, in contrast with a single-mode laser, low frequency RIN (or excess noise) two-mode laser can increase more than 6 dB after frequency-doublin...

the intensity of noise, heat and light were measured in 10 different groups of food processing plants with 3820 employees. noise was measured in 265 working places and if the over-all noise was more than t.l.v. (90dba), the octave band analysis was carried out. effective temperature (e.t) or corrected effective temperature (c.e.t) were measured in 183 working places and air velocity relative hu...

We present investigations of the the relative intensity noise (RIN) of a quantum cascade laser (QC) laser in continuous wave operation. We analyze the intensity noise properties in terms of the relative intensity noise (RIN). In contrast to conventional interband semiconductor diode lasers we obtain a different scaling behavior of RIN with increasing optical output power for QC lasers. From a s...

The modulation response, relative intensity noise (RIN) and frequency noise (FN) characteristics of quantum dot (QD) lasers are investigated theoretically in the presence of an external optical beam. Using small signal analysis of the rate equations for carriers and photons, it is demonstrated that by injecting excess carriers into the QDs excited state through optical pumping, the modulation r...