Some Oscillation Wavelength Shift Characteristics of a Semiconductor Laser in a Magnetic Field

a swot analysis of the english program of a bilingual school in iran

با توجه به جایگاه زبان انگلیسی به عنوان زبانی بین المللی و با در نظر گرفتن این واقعیت که دولت ها و مسئولان آموزش و پرورش در سراسر جهان در حال حاضر احساس نیاز به ایجاد موقعیتی برای کودکان جهت یاد گیری زبان انگلیسی درسنین پایین در مدارس دو زبانه می کنند، تحقیق حاضر با استفاده از مدل swot (قوت ها، ضعف ها، فرصتها و تهدیدها) سعی در ارزیابی مدرسه ای دو زبانه در ایران را دارد. جهت انجام این تحقیق در م...

Laser-Controlled Local Magnetic Field with Semiconductor Quantum Rings

Wavelength switching using multicavity semiconductor laser diodes

We demonstrate wavelength switching in a novel multicavity distributed Bragg reflector semiconductor laser diode. This new device, which uses an integrated saturable absorber and singlemode fiber Bragg gratings, digitally switches wavelength as a function of drive current between all possible binary combinations.

Wavelength dependence of TO in InGaAsP semiconductor laser diodes

The temperature sensitivity of laser threshold current in single mode, wavelength tunable, InGaAsP bulk active region semiconductor lasers diodes is measured in the temperature range, 293 K 6 T 6 355 K and wavelength range 1.23 pm il < <, 1.35 pm. When proper account is taken of peak gain variation with temperature, the temperature dependence of laser threshold current (parameterized by T,) is ...

High-speed wavelength-swept semiconductor laser with a polygon-scanner-based wavelength filter.

Ultrahigh-speed tuning of an extended-cavity semiconductor laser is demonstrated. The laser resonator comprises a unidirectional fiber-optic ring, a semiconductor optical amplifier as the gain medium, and a novel scanning filter based on a polygonal scanner. Variable tuning rates up to 1150 nm/ms (15.7-kHz repetition frequency) are demonstrated over a 70-nm wavelength span centered at 1.32 micr...