Self-aligned non-dispersive external cavity tunable laser

Self-aligned non-dispersive external cavity tunable laser.

We are reporting on a novel self-aligned non-dispersive external cavity laser (ECL) based on thick volume holographic gratings (VHG). The ECL is tunable and operates with single mode and broad area multimode laser diodes. We experimentally demonstrate tunable single frequency operation at 405 nm and 785 nm. The tunable ECL concept is also experimentally tested with high power broad area laser d...

Electronically tunable external-cavity laser diode.

We present a new concept for an electronically tunable diode laser. It is based on an external-cavity configuration with simultaneous feedback and intracavity spatial separation of the laser's spectral components. The electronical tunability is achieved by insertion of a liquid-crystal array as an electronically controlled aperture into the region of spatial separation of the spectral component...

Electronically tunable single-mode external-cavity diode laser.

A six-stage birefringent filter placed in an external cavity of an AlGaAs diode laser is used to scan the laser electronically over 10.3 nm, hopping single modes of the external cavity. Continuous electronic tuning of the single mode over the free spectral range of the external cavity, 182 MHz, is also demonstrated by using a variable-phase plate. All tuning mechanisms use nematic liquid-crysta...

Coupled-ring reflector in an external-cavity tunable laser

MIN REN, HONG CAI, LIP KET CHIN, K. RADHAKRISHNAN, YUANDONG GU, GUO-QIANG LO, DIM LEE KWONG, AND AI QUN LIU* School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore Institute of Microelectronics, A*STAR, 11 Science Park Road, Singapore 117685, Singapore e-mail: [email protected]‐star.edu.sg e-mail: [email protected]‐star.edu.sg *Corres...

Broadly Tunable External Cavity Quantum Cascade Laser Development