Table 2. Summary of the Refractive Index Sensitivity and Lasing Mechanism for Various Laser Biosensors.
| Laser system | λ (nm) | Sb (nm/RIU) | Pump method, Operating mode | Gain material, External/integrated gain |
|---|---|---|---|---|
| Plasmonic external cavity laser | 850 | 549 | Electrical injection, CW | SOA, external gain |
| External cavity laser [18] | 850 | 212 | Electrical injection, CW | SOA,external gain |
| Distributed feedback laser [19] | 588 | 100 | Optical pumped, pulsed | Laser dye, integrated gain |
| Photonic crystal laser [20] | 1600 | 350 | Optical pumped, CW | SQW/MQW, integrated gain |
| Whispering gallery microlaser [21] | 1550 | - | Optical pumped, CW | Er + ions, integrated gain |