Nine-Channel Wavelength Tunable Single Mode Laser Array Based on Slots

Abstract

A 9-channel wavelength tunable single-mode laser array based on slots is presented. The fabricated laser array demonstrated a threshold current in a range of 19~21 mA with the SOA unbiased at 20°C under continuous wave condition. Stable single mode performances have been observed with side-mode suppression-ratio (SMSR) > 50 dB. The output power higher than 37 mW was obtained at the SOA injected current of 70 mA for all the 9 channels within the laser array. A wavelength quasicontinuous tuning range of about 27 nm has been achieved for the laser array with the temperature variations from 10°C to 45°C. This array platform is of a single growth and monolithically integrable. It can be easily fabricated by standard photolithography. In addition, it potentially removes the yield problem due to the uncertainty of the facet cleaving.

Simple and compact V-cavity semiconductor laser with 50×100 GHz wavelength tuning

“…It is worthwhile to point out that the temperature induced wavelength tuning is 0.1 nm/°C for grating based tunable lasers due to refractive index variation. For a temperature variation of 35°C, the wavelength tuning range is only about 3.5 nm [23]. The temperature-induced tuning range extension in the V-cavity laser is 5-times more sensitive by using the mechanism of the gain spectrum shift.…”

“…In this paper, we report extended wavelength tuning range in the V-cavity laser by employing the mechanism of temperatureinduced gain spectrum shift. While temperature tuning is commonly used in many types of tunable lasers, its tuning range is limited by the thermal-optic coefficient of 0.1 nm/°C and a laser array is needed to cover the full wavelength band [10,23]. Here we show that by combining temperature-induced gain spectrum shift with current controlled co-directional wavelength tuning in V-cavity laser, the tuning range can be extended by about 15 nm with a temperature variation of only 35°C.…”

Eight‐channel hybrid‐integrated laser array with 100 GHz channel spacing

“…Each laser consists of the front section with around 124 μm in length, the slotted section containing 12 slots and the back section. The lasing wavelengths with 100 GHz channel spacing are achieved by changing the slot width d s = (2 m s + 1) λ B /4 n s and spacing width d w = (2 m w + 1) λ B /4 n w based on the Bragg's law [4, 5 ] as shown in Fig. 1 c .…”