Michele Agresti, product line manager, datacom VCSELs
at II-VI was not altogether surprised that industry reports predict growth for VCSEL
In 2014, almost 20 years since the technology was first used in datacoms, VCSELs
started to make their way into high-volume consumer smartphones.
Karout et al., "30 Gbps 4-PAM transmission over 200 m of MMF using an 850 nm VCSEL
," Optics Express, vol.
Table 1 Electrical components used for power supply of VCSEL
OPV302 Symbol Value D2 Schottky diode 60V3A DO201AD C1 Electrolytic capacitor 220uF 63 V +20/-10% C2 Electrolytic capacitor 47uF 25 V OUT IN COM Positive Voltage Regulator 7805 TO220 Q1 Amplifier transistor C547B R4 Resistor 510 [OMEGA] R5 Resistor 51 [OMEGA] U4 Operational amplifier LM2904N R6 Resistor 510 [OMEGA] R7 Trimmer potentiometer Bochen 3296 100K R8 Resistor 3,76 K[ohm] R9 Resistor 344 [ohm] C3 Electrolytic capacitor 47uF 25 V L1 OPV 302 VCSEL
Table 2 Photodiode power supply and signal amplification circuit electrical components Symbol Value R1 Resistor 109,5 K[ohm] R2 Resistor 21,8 K[ohm] R3 Resistor 1 M[ohm] U1 Dual Operational Amplifier LM358N D1 Photodiode PD15-22b
In an electrically pumped VCSEL
, it is not possible to inject carriers uniformly across a wide area for a large beam diameter in the laser cavity by traditional diode current injection .
Twenty-four channel, industry-standard 850-nm VCSEL
(vertical cavity surface emitting laser) and photodiode arrays are directly flip-chip soldered to the Optochip.
In addition, it uses Finisar's VCSEL
(vertical cavity surface emitting laser) array technology, which offers high reliability and performance.
These interconnection options include a several critical optical interfaces used for: a) waveguides to/from optical fibers or b) waveguides to/from waveguides or c) waveguides from VCSEL
's, edge-emitting diode lasers, and to photo detector connections.
In addition to the need for the optical interconnect, there will also he a requirement for transmitter (VCSEL
) to waveguide to receiver coupling and small radius 90[degrees] bends.
As to its more mouse-like properties, the IOGEAR has VCSEL
(Vertical Cavity Surface Emitting Laser) as a light source, giving it 30 times more tracking power than mice with optical sensors.
To handle a higher modulation rate and take full advantage of the new technology, fiber manufacturers created a vertical cavity surface-emitting laser (VCSEL
) as an alternative to the LED.