| 1. |
- Gustavsson, Johan, 1974, et al.
(författare)
-
High-speed 850-nm VCSELs for 40 Gb/s transmission
- 2010
-
Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- We have explored the possibility to extend the data transmission rate for standard 850-nm GaAs-based VCSELs beyond the 10 Gbit/s limit of today's commercially available directly-modulated devices. By sophisticated tailoring of the design for high-speed performance we demonstrate that 10 Gb/s is far from the upper limit. For example, the thermal conductivity of the bottom mirror is improved by the use of binary compounds, and the electrical parasitics are kept at a minimum by incorporating a large diameter double layered oxide aperture in the design. We also show that the intrinsic high speed performance is significantly improved by replacing the traditional GaAs QWs with strained InGaAs QWs in the active region. The best overall performance is achieved for a device with a 9 μm diameter oxide aperture, having in a threshold current of 0.6 mA, a maximum output power of 9 mW, a thermal resistance of 1.9 °C/mW, and a differential resistance of 80 Ω. The measured 3dB bandwidth exceeds 20 GHz, and we experimentally demonstrate that the device is capable of error-free transmission (BER
|
|
| 2. |
- Westbergh, Petter, 1981, et al.
(författare)
-
32 Gb/s transmission experiments using high speed 850 nm VCSELs
- 2009
-
Ingår i: Conference on Lasers and Electro-Optics (CLEO). - 2162-2701. - 9781557528698 ; , s. 1-2
-
Konferensbidrag (refereegranskat)abstract
- We demonstrate error free transmission at bit rates up to 32 Gb/s at room temperature and 25 Gb/s at 85degC using a 9 mum oxide aperture 850 nm VCSEL. The VCSEL design is optimized for high speed operation by minimizing parasitics, reducing self-heating, and using strained InGaAs quantum wells to improve differential gain.
|
|
| 3. |
- Westbergh, Petter, 1981, et al.
(författare)
-
32 Gbit/s multimode fibre transmission using high-speed, low current density 850 nm VCSEL
- 2009
-
Ingår i: Electronics Letters. - : Institution of Engineering and Technology (IET). - 1350-911X .- 0013-5194. ; 45:7, s. 366 - 368
-
Tidskriftsartikel (refereegranskat)abstract
- Error free transmission over multimode fibre at data rates up to 32 Gbit/s at 25C and 25 Gbit/s at 85C using an oxide confined 850 nm VCSEL biased at a current density of 11–14 kA/cm2 is demonstrated. The VCSEL is optimised for high-speed by reducing capacitance and self-heating and by using strained InGaAs quantum wells for high differential gain.
|
|
