Publications

Optically-pumped vertical-external-cavity surface-emitting laser at 1.55 μm emits 77 mW CW single-mode output power with a SMSR above 60 dB at 20°C.

High-performance and compact push-push oscillators operating up to 215 GHz were realized in a 0.5 ìm emitter double-heterojunction InGaAs/InP HBT (D-HBT) technology with maximum oscillation frequen

We have developed a 1-mm-long high-power DFB laser using an asymmetrical cladding based on the dilute waveguide technique.

The joint authors of this comprehensive paper are all British, and have been employed on Standard Communication Laboratories on variable frequency multipliers for periods ranging from 10 to 25 year

Quantum-cascade distributed-feedback lasers with high-power, continuous-wave (cw), tunable, single-mode emission are reported. The emission wavelengths are near 5.2 and 7.95 mu m.

planar, fully gain guided tapered lasers deliver 1.5 W CW, with M2 = 1.6, T0 = 143 K and a slow axis divergence of only 1.3° FWHM and 2.4° at 1/e2.

Index-guided tapered lasers at 975 nm deliver 1 W CW, with a low M2 of 1.6 at 1/e2, which is a record for such a device, no measurable astigmatism, and a narrow far-field angle of 6.8deg FWHM.

We report the demonstration of high-power and low relative intensity noise (RIN) directly modulated distributed feedback lasers at 1.55 μm.

We describe for the first time to our knowledge the performance for a linear array of tapered laser diodes with both fast- and slow-axis collimation using a microlens for fast-axis collimation and

We propose a low-complexity and high-precision symbol synchronization algorithm based on dual-threshold amplitude decision for FPGA-based real-time Intensity Modulation Direct Detection (IMDD) OFDM