Abstract
The characteristics of intra-cavity distributed Bragg reflector (DBR) quasi-phase-matched (IDQPM) second-harmonic-generation (SHG) lasers are theoretically studied. In the IDQPM-SHG laser, a QPM device and a DBR for feedback are separately fabricated on the same substrate with the QPM device placed between the DBR and a semiconductor laser. The threshold current of the IDQPM-SHG laser depends on the coupling efficiency between the laser diode and the QPM waveguide and the reflectivity of the DBR. The SH output of the IDQPM-SHG laser is strongly dependent on the generalized SHG conversion efficiency, κ. This laser has the potential to attain an SH output over a 30-mW using a currently available 50-mW semiconductor laser for the fundamental light source, when highly efficient QPM device (κ=2.2 W-1) is used. Its tolerance for various deviations from the initial design and the problems to develop a commercially available IDQPM-SHG laser are also discussed.
| Original language | English |
|---|---|
| Pages (from-to) | 371-376 |
| Number of pages | 6 |
| Journal | Optical Review |
| Volume | 2 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 1995 Jan 1 |
Keywords
- distributed Bragg reflector (DBR)
- intra-cavity
- quasi-phase-matching (QPM)
- second harmonic generation (SHG)
- waveguide
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics