External cavity diode laser with electrooptic wavelength tuning

Antireflection-coated blue GaN laser diodes in an external cavity and Doppler-free indium absorption spectroscopy

“…More recently, ECDL concepts without moving parts were described that, for example, employ a liquid-crystal array 11 or an electrooptical modulator. 12,13 Since our first successful AR coating of the GaN-based LD, both Littrow and Littman configurations were proved to work with these diodes. 14,15 The objective of the current study is to characterize the performance of our Littrow cavity with an implemented AR-coated GaN LD.…”

Near-IR tunable laser with an integrated LiTaO_3 electro-optic deflector

“…The design resulted in ϳ33-nm electronic tuning range that exceeds that of the previously reported ͑ϳ1-nm electronic tuning ranges͒, similarly designed visible laser. 6 Because the electro-optic effect is a virtually instantaneous nonlinear optical phenomenon, the device speeds are limited only by the electrode design ͑i.e., drive and input impedance matching, optical and rf driving field coincidence-traveling-wave design issues͒, and the switching times can be in time scales of nanoseconds to picoseconds, allowing the potential for use in a large number of applications in which both wavelength tunability and tuning speed are important, such as in reconfigurable wavelength division multiplexing sources 14 or spectroscopic uses 15 such as differential absorption lidar. Fig.…”

“…Subsequent to the experiments described here, we became aware of a recent conference proceeding in which a 780-nm laser diode was tuned with an electro-optic deflector by use of a tuning concept similar to that reported here. 6 However, because LiNbO 3 was used, the deflector design was implemented in a rectangular geometry and, as discussed above, resulted in an electronic tuning range of only 1 nm, in contrast to the nearly 33 nm of tuning presented here with the horn-shaped scanner design.…”